BBQ PITS BY KLOSE   1355 JUDIWAY   Houston, Texas 77018-6005  USA   

                                                         1-713-686-8720    1-800-487-7487

 Single, Double, Triple, & Four Sink Setups.
Propane or Electric Hot Water on Demand.
Fresh & Gray Water Holding Tanks-All Sizes.
Side Drain & Splash Boards also Available.

Available on any size Klose Mobile Smoker.
Also can be bordered in Stainless Steel, Polished Aluminum Step Plate, Acrylics,
Granite, and More.

Sinks can be made of Stainless Steel,
Composites, Travestine Stone, or Glass
with your Logo's Burned in.


               Copyright 1986-2013
                 Klose Graphics Design
For More Information Contact:

  Shown Here on a 28" by 7ft Smoker with 28x28 Upright.
Under Carriage on demand tankless hot water in LP or
Electric also available. Polymer, Steel or SS Holding Tanks

Choices of Sinks made from the Usual Stainless Steel or:
Brass, Copper, Smoked Glass, & Solid Travestine Stone.

Choices for the frames of the Sinks from SS, Granite of
any different color, Smoked Glass, etc.

Faucets Avail. in any configuration they sell at the Stores.
Call David Klose at 1-713-818-2263 for Details, Pricing, Options, & Descriptions. BBQ Pits by Klose


New Tankless Hot Water On Demand with Hydro-Ignition
Powerful enough to also install into & run your entire House

New Top Mounted, Gravity Fed Water Tanks Available.
Solid Copper Tubing, & highest Quality Hardware Avail.

New On Demand indoor/outdoor Instant Heating.

On Demand Hot Water Appliance details

. Burner output proportional to hot water flow demand for maximum energy efficiency

. Stainless steel burners with stabilized blue flame

. Built-in corrosion resistant draft diverter

. Adjustable water flow restrictor to ensure that water

flow demand will not exceed the heating capacity of

the heater

. Safety flame sensor at pilot burner

. Automatic overheating protection shut-off sensor

. Copper heating coils for endless supply of hot water

. Easily removable one-piece cover

. Easy one person installation

. Electronic Pilot Ignition driven by hydro-generator.

Specifications (Technical data)

Approved in US/Canada


Maximum flow rate: 3.7 GPM (14 l/min) at a 45F

(25C) rise.

Maximum output

101,772 Btu/h (29.8 kW)

Maximum input

117,000 Btu/h (34.3 kW)

Efficiency in %

Recovery efficiency 80%

Min. Output

28,000 Btu/h (8.2 kW)

Gas Requirement

Gas connection (inches) - .

Inlet gas pressure under maximum operation*

. Propane: 10.5. - 14. water column

. Natural Gas: 5.7. - 14. water column.

* To measure Gas Pressure, see Measuring Gas

Pressure, chapter 3.6.



. Hot water connection (inches) - .

. Cold water connection (inches) - .


. Water valve material: Polymer (PPS) (Polypropylene


. Minimum water flow: 0.5 gallon/minute (1.9 l/m)

. Minimum recommended water pressure: 30 PSI

(2.07 bar)

. Connections:

. Bottom of heater


. Depth (in): 10.5. (265 mm)

. Width (in): 18.25. (460 mm)

. Height (in): 36.75. (936 mm)

. Weight: 64 pounds (29 kg).

Gas types

Natural Gas.

LP Gas

Safety devices

. Flame failure device (ionization flame rod sensor)

. Pressure relief valve (supplied with heater)

. Over heat prevention (temperature limiter).

Water resistant

IP X5 (protection against water drops).


not approved or designed for:

. Manufactured (mobile) homes, RV's or boats

. Heating or other recirculating/pumping applications*

. Solar/preheat backup or high temperature booster


* This includes domestic hot water circulator pump loop

systems that may previously exist in a home hot water

system. The use of a small electric mini-tank (4-6 gallon

size) should be used for this application; when

designed so the pump will circulate the hot water in the

mini-tank only and through the building's hot water

return loop (timed or thermostatic controlled operation

of the pump is commonly done). The GWH-425-HNO

should be plumbed in line before the mini-tank water

heater, contact BBTNA if further instruction is needed.


3 Installation instructions

3.1 Introduction

Please follow these instructions. Failure to follow

instructions may result in:

B Damage or injury.

B Improper operation.

B Loss of warranty.

Please contact BBT North America with any questions.

3.2 Proper location for installing your heater

Carefully select the location of the water heater.

Follow the guidelines below:

B 1. Locate the heater where an adequate gas line size

and plumbing connections are feasible and


B 2. The hot water lines should be kept short to save

energy. Centrally locating the water heater is best. It

is always best to have hot water lines insulated to

prevent the possibility of any freeze damage.

B 3. The water in this heater is cold and always remains

cold except for the times that hot water is being used.

The heater is equipped with freeze prevention

equipment that will operate and prevent freezing of

the water in the heater to 5F with no wind chill.

Electrical power must be maintained to the heater to

allow this to function.

WARNING: Proper insulation of the

water lines below the heater is required

if below freezing temperatures, below

32F, are ever anticipated!

Danger: If the temperature drops

below 32F, freeze damage to the water

heater itself must be prevented by

turning off the power to the heater, then

disconnecting the plumbing connections,

as well as removing the drain

plug and introducing short bursts of

compressed air (20-40 psi) through the

heater's connections. This will remove

the residual water in the horizontal

pipes and water valve.

Danger: Keep children away as the top

of the water heater vent cap will get very

hot during operation. Install in a place

that prevents the top of the heater being

reached by small children.

Danger: Flue gases will be released

through the vent cap. Flue gas is very

hot and contains carbon monoxide. The

heater cannot be installed indoors. To

prevent risk of fire and poisoning by

carbon monoxide, assure all clearances

indicated in manual.

Danger: Surface temperature around

vent cap is less than 140F, except

highest top surface of vent cap may

reach 300F.

Danger: Do not place or store any

combustible material within 5 feet of the

appliance. Risk of fire could be caused

by hot flue gas.

Warning: Flammable materials,

gasoline, pressurized containers, or any

other items or articles that are potential

fire hazards must NOT be placed on or

adjacent to the heater. The appliance

area must be kept free of all

combustible materials, gasoline and

other flammable vapors and liquids.


Installation instructions

3.5 Gas piping & connections

Before connecting the gas supply, check the rating

plate on the right side of the heater to be sure that the

heater is rated for the same gas to which it will be


Note: comes with a gas pressure regulator installed.

Disconnecting or altering the gas pressure regulator

will be a violation of CSA  certification of the unit.

The regulator supplied with the heater is preset for the

gas shown on the rating plate to the correct pressure.

It is an appliance level regulator designed for (low inlet)

pressure (less than 1/2 Psig or 14" W.C.).


B Install a manual gas shut off valve, on the gas supply


B Install a union when connecting gas supply.

B The minimum diameter required for any appliance

connector used is ..

B National Fuel Gas Code requires that a sediment

trap (drip leg) be installed on gas appliances not so

equipped. The drip leg must be accessible and not

subject to freezing conditions. Install in accordance

with the recommendations of the serving gas


When connections are made, check for gas leaks at all

joints. Apply some gas leak detection solution to all gas

fittings. Bubbles are a sign of a leak. A combustible gas

detector may also be used to detect for leaks.


The pressure regulator provided with the heater is

adjusted to deliver the proper gas pressure (as

indicated on the rating plate and in the manual for

altitude up to 2000 feet (660 meters) above sea level.

On appliances being installed above 2000 ft (660

meters) elevation, the inlet gas pressure should be set

at installation to the value shown below.

Note: The gas pressures specified below refer to

pressures taken at the pressure tap on the gas inlet pipe

just above the regulator. See chapter 3.6 for measuring

gas pressure.



The gas supply piping should be sized according to the

applicable code for a maximum draw of 117,000 BTUH.

Measure the length of gas supply line and use the tables

in Fig. 8 or the gas line manufacturer”s sizing tables to

determine the pipe diameter necessary to

accommodate the BTU demand of the unit. If there are

more gas drawing appliances on the line, size the gas

line according to the total maximum amount of BTU

draw for all appliances.

Note: Under sizing the gas line may result in diminished

output and improper operation. See chapter 3.6 for the

procedure to confirm gas pressure.

Warning: DO NOT connect to an

unregulated or high pressure propane

line or to a high pressure commercial

natural gas line.

Warning: The heater must be isolated

from the gas supply piping system

during any pressure testing of that

system at test pressures equal to or

more than 0.5 psig. If overpressure has

occurred, such as through improper

testing of the gas lines or malfunction of

the supply system, the gas valve must

be checked for safe operation

Danger: If you have a leak, shut off the

gas. Tighten appropriate fittings to stop

leak. Turn the gas on and check again

with a gas leak detection solution.

Never test for gas leaks using a match

or flame.

Altitude Nat. Gas

inches W.C.

Liquid Propane

inches W.C.

0. - 2 000 ft 5.7. 10.5.

2 000 ft - 4 500 ft 4.6. 8.4.

Table 3 Above 4.500 ft consult your local gas provider

8 716 473 148

Installation instructions


Maximum Capacity of pipe in Cubic Fee


3.6 Measuring gas pressure

Connecting manometer

B Shut off gas.

B Remove front cover and locate inlet gas pressure

measuring point on the right side of the gas valve.

B Loosen screw from test point on the left side of gas

valve and connect manometer tube on test point.

Static pressure test

B Turn gas supply back on.

B Operate all other gas appliances on same gas piping

system at maximum output.

B Record static gas pressure reading on back page of


Operating pressure test

B Run high hot water flow rate.

B Set flow control knob fully clockwise.

B Set slide control to the right.

B Record operating gas pressure reading on back

page of manual.

Gas pressures lower than 5.7" W.C. for Natural Gas or

10.5" W.C. for LP Gas will result in insufficient degree

rise to the hot water being used, and must be corrected.

See Gas Line Sizing under chapter 3.5.

3.7 Water connections

When facing the heater, the . cold water inlet is on the

bottom right and the hot water outlet is on the bottom





Although water piping throughout your structure may be

other than copper, we recommend that copper piping

or suitably rated stainless steel flex line piping be used

for at least three feet before and after the heater (follow

local codes if more stringent). Never sweat any rigid

piping directly to or beneath the water connections,

damage can occur to the internal water valve from

heating of the pipe. Plastics or other PEX type plumbing

line materials are not recommended for connecting

directly to the water heater. Keep water inlet and outlet

pipes to no less than " (12.7mm) diameter to allow the

full flow capacity.

It is recommended that all water piping below the

heater be properly insulated to avoid heat loss. If

below freezing temperatures are ever anticipated where

the heater is located, insulation material is required and

must be capable of protecting the piping from freezing.

The freeze protection that is equipped within the heater

will not prevent any freeze damage to the exterior water


If the cold and hot connections to the heater are

reversed, the heater will not function. Be certain there

are no loose particles or dirt in the piping. Blow out or

flush the lines before connecting to the water heater.

Full port valves should be installed on both the cold

water supply and hot water outlet lines to facilitate

servicing the heater (see Fig. 9). For installation on a

private well system with the use of a pressure tank, the

lowest pressure range setting recommended is 30-50

psi (2.07 and 3.45bar).

Connecting the pressure relief valve (PRV)

A listed pressure relief valve supplied with the heater

must be installed at the time of installation. No valve is

to be placed between the PRV and the heater. No

reducing coupling or other restriction may be installed

in the discharge line. The discharge line must be a

minimum of 4. above a drain and installed such that it

allows complete drainage of both the PRV and the line.

The location of the PRV must be readily accessible for

servicing or replacement, and be mounted as close to

the water heater as possible. See Fig. 9. To install the

PRV, a suitable fitting connected to an extension on a

.T. fitting can be sweated to the hot water line.

Support all piping.


4 Operation instructions

4.1 For your safety read before

operating your water heater

A. This appliance is equipped with electronic ignition for

lighting the main burners. When turning the heater on,

follow these instructions exactly.

B. What to do if you smell gas.


B Do not try to light any appliance.

B Do not touch any electric switch; do not use any

phone in your building.

B Immediately call your gas supplier from a neighbors

phone. Follow the gas supplier.s instructions.

B If you cannot reach your gas supplier, call the fire


C. Use only your hand to turn the on/off control switch.

Never use tools. Follow these instructions exactly. If

control switch is jammed, close the gas supply and call

a qualified service technician. Attempted forceful repair

may result in a fire or explosion.

D. Do not use this appliance if any part has been under

water. Immediately call a qualified service technician to

inspect the appliance and to replace any part of the

control system and any gas control which has been

under water.

4.2 Lighting instructions

B 1. STOP! Read the previous safety information.

B 2. Turn off power supply to heater.

B 3. Open the cold water inlet supply to the heater fully.

B 4. Open a hot water faucet to permit the water to fill

the heater and the piping and to eliminate the air

trapped in the system.

B 5. Close the hot water faucet after the water flows

freely and all the air has escaped from the system.

The water heater is now ready to operate.

B 6. Open gas isolation valve. Wait five (5) minutes. If

you smell gas, STOP! Follow .B. in the safety information

above. If you do not smell gas, go to the next


B 7. Set the switch (located behind the sliding viewer

window on the front panel strip) to the .ON. position.

In this position, the water heater is ready to use.

Note: On first time initial installation, existence of air in

the gas supply line and in the water line may cause

some ignition delay. In that case, repeatedly open and

close the hot water tap in order to restart the ignition

process until all the air has been purged.

B 8. Turn the hot water faucet on to the minimum flow

rate required to activate the heater. The automatic

ignition system first ignites the safety pilot burner

which then ignites the main burner in about 4


B 9. The pilot flame will extinguish 10-30 seconds after

the burners come on. The burners will remain on until

the hot water tap is turned off.

B 10. For maximum power, slide gas valve button all the

way to the right.

4.3 To turn off appliance

B Turn off the manual gas shut off valve on the supply

line to the heater. See Fig. 11.

B Turn power switch to the off (O) position.

B Drain water lines if unit will sit for a long period of


4.4 Setting the water temperature

This unit has a gas control that modulates burner

input in response to flow. Its purpose is to ensure that

the hot water temperature will remain steady, although

the water flow demand might vary. The output

temperature can be adjusted with either the

temperature adjustment knob or the gas control slide.

Fig. 10 Temperature Adjustment Controls

Temperature adjustment knob

The temperature adjustment knob on the front bottom of

the heater (see Fig. 10) adjusts temperature by

adjusting flow capacity. See table 4 for details.

5 Maintenance and service

5.1 Maintenance intervals

The 425 HNO requires periodic maintenance. The

below time maintenance intervals should kept the unit

operating for many years.

Every year

B Inspect inlet water filter screen ( 5.2)

B Inspect pilot assembly and flame ( 5.3)

B Inspect burner assembly ( 5.4)

B Inspect vent assembly ( 5.6)

Every 2 years

B Lubricate and clean water valve ( 5.2)

Every 3 to 5 years

B Rebuild water valve ( 5.2)

B Clean pilot assembly and clean or replace orifice

( 5.3)

5.2 Water valve

The water valve is the main control that tells the heater

to fire. If the periodic maintenance is neglected, more

costly damage may occur over time.

Inspecting inlet water filter screen

Shut off the installer supplied cold water supply valve.

Disconnect water pipe going to the back of the water

valve. Remove filter from back of water valve. Clean the

filter and inspect for damage. Replace if the filter is at all

damaged. Inspect the top of the water valve for signs of

a water leak or corrosion. If present, rebuild the water

valve. (See below).

Lubricating the water valve

A more detailed instruction is available on our website

at Shut off all water to the unit and

disconnect water pipe going to the back of the water

valve. Disconnect water pipe going to heat exchanger

by removing pin and pulling pipe out. Loosen two set

screws at the base of the gas valve and drop the water

valve down. Separate the two halves by removing 5

screws on the top of the water valve. Apply lithium or

faucet and valve grease to the pushrod (see Fig 14,

pos. 31). Inspect and clean the venturi (see Fig 14,

pos. 49).

Rebuilding the water valve

Several parts within the water valve should be replaced

every 3-5 years. The parts list and instruction can be

found on our website at

5.3 Pilot

Inspecting pilot

The pilot should burn with a clean sharp blue flame. The

flame should fully envelope the bend of the flame sensor

rod. If it does not, clean the pilot assembly per

procedure below.

Cleaning pilot assembly

Disconnect the flame sensor rod cable and the igniter

cable by pulling gently down. Remove two screws holding

pilot assembly in place. Loosen compression fitting

and remove pilot assembly. NOTE: The orifice sits on

top of the compression fitting DO NOT LOSE. Polish

flame sensor rod and igniter tip with emery cloth. Clean

out pilot assembly and orifice with carburetor cleaner. If

heater is an LP unit, replace orifice. Caution: Do not

enlarge orifice.

5.4 Main burners

The main burner flames should be blue, with a more

intense blue cone in the center core. Yellow flames

could be a sign of wrong size gas orifices or dirty

burners, or a blockage on the heat exchangers fins. If

some burners have yellow flames while others have

good flames, it is likely that dust, lint or spider webs

have partially clogged the burner venturis. To clean the

burners, contact a gas service person.

5.5 Vent assembly

Inspect the draft hood and heat exchanger fins for signs

of soot build-up or any other foreign material such as

spider webs. Clean out any debris found in the vent

hood. Signs of soot indicate insufficient combustion air

or exhaust draft. Check for vent assembly blockage or

combustion air blockage on the underside of the unit.

5.6 Mineral scale build-up

When operated at lower temperatures settings, this unit

does not accumulate mineral build-up. If

however, the heater is used at the higher temperature

settings and the water has a high mineral content,

periodic descaling may be necessary. The heating coils

should be flushed with a descaling solution. Consult

your dealer or BBT North America for instructions.

Consult your service person.

 [Return to the Klose home page]

Stainless Steel Sinks with Solid Polished Brass Faucets are Nice

        Double Sink Setup in Polished Aluminum Floor Plate.
         Triple or even Four Sink Setups also Available here.

Sinks shown here on a 42 Inch Diameter by 10 foot Mobile
with 42 x 42 Inch Upright Slow Smoker, & gas fired heat box
over the Firebox, 5 burners on the rear, & steak grill on the nose.


               Nice Overall View of this Monster Mobile.

        Single to Quadruple Sinks Available on any Model.

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