Water heater install

[drh1965]

The hose on the output of my Universal M18 freshwater pump is 3/8 ID. The water heater I'm looking at wants 5/8 ID. What is the proper way to plumb this?

Thanks!

[Jim St.Pierre]

Hello Darrell, It shouldn't make much difference with the 5/8. When you fill the water heater the pressure will remain the same at all times. It is the volumn that you may see a difference in. This will be when you open your faucet it will seem like you are loosing pressure, but in all actuallity, it will be the volumn. I think most water heaters have a 3/4 IPS thread either male of female, depending on the make of the water heater. If your supply to your plumbing system is 3/8 then you will see no difference at all. Hope this helps.

[Jim St.Pierre]

Hi again Darrell, I found this info on a LP fired instant water heater... Might be a better way to go.... Just a thought...











Type:
Gas instantaneous, power vented. Full gas modulation temperature control.Dimensions:11.5" Wide x 13.5" Deep x 19" High, including Power Vent. Weight: 30.5 pounds full.Hook-ups:Electric: 18-2 x 2' lead.
Gas: Brass 3/8" flare inside case, rear accessible.
Water: 1/2" OD copper tubing. Brass compression to 1/2" NPT elbow can be installed
or as specified.
Capacity:55,000 Btu input - 44,000 Btu output at maximum burn at 8.5 WCI manifold pressure.
15,000 Btu input - 10,600 Btu output at low burn at 1.2 WCI manifold pressure.
(88°F temperature rise per gallon per minute continuous flow at high burn).
Fuel Consumption:2.55 lbs per hour at maximum input. ( At 2 GPM of water, 20 lbs of propane will produce over 940 gallons of hot water).Mounting:Side mounted keyed bracket. Left or right side mounted.
Clearances:Zero clearance top (blower), bottom and sides. 2" in back for hook-ups. Enough space in front to remove cover for service.
Fuel:“2” power vent with proofing switch. (2” stainless flex duct recommended to the outside and can
run up to 15').
Construction:Modular: Three assemblies; gas, electronics and water.
Burner: High primary air, 12 element, atmospheric type. Aluminized steel body with stainless flame strips.
Heat exchanger: Copper fin tube type with wrap for cooling.
Electronics: Plug in, potted, works-in-a-drawer.
Case and flue assembly are stainless steel.
Fuel:Propane at 11 WCIPower:Burner: 12 element high primary air, atmospheric type with stainless steel flame strips. Aluminum manifold with brass pressure tap.
Orifices, brass # 71 x 12. Gas Valve. Redundant solenoid with integral regulatorWater Temperature:Factory set at 115° F. Can be field adjusted 90° to 135°F.
MountingMounting flanges included. Must be mounted in accordance with any applicable Coast Guard and ABYC recommendations.
Safety Features:The Shower-Mate is pilotless. There is no flame unless water flow is sensed.
Flame rectification: Gas valve shuts off in .8 of a second if there is a flame outage.
Redundant gas solenoid.
Electronic high temperature shut-off (two).
ECO high temperature shut off @ 165°F with manual reset.
Pressure relief valve at 100 PSI.
Power vent must proof fluing before gas valve opens.
Disclaimerue to continuous product improvement,
PrecisionTemp reserves the right to change specifications at any time.

[drh1965]

Originally Posted by Jim St.Pierre

Hello Darrell, It shouldn't make much difference with the 5/8. When you fill the water heater the pressure will remain the same at all times. It is the volumn that you may see a difference in. This will be when you open your faucet it will seem like you are loosing pressure, but in all actuallity, it will be the volumn. I think most water heaters have a 3/4 IPS thread either male of female, depending on the make of the water heater. If your supply to your plumbing system is 3/8 then you will see no difference at all. Hope this helps.

Thanks for the help.