Question about Noritz Commerical Tankless Water Heater N-132M-ASME-NG

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I have a two tank system drastically losing water pressure when swiches from one tank to the other . What could the problem be ?

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There are several small filters in the inlet sides of the tankless heaters, you might start there..

Posted on Jan 27, 2011

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Posted on Jan 02, 2017

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Water flow is v low out of aquasana RO system on kitchen sink. Landlord says filters are fairly new. NO flow !


Check storage tank. The tank must be emptied of water and 7 psig air is applies to Schrader valve on bottom. of tank. It is not uncommon for tanks to lose pressure, however there are time s where the bladder devolve a hole and ends up with water on both sides.

Feb 25, 2018 | Water Water Heaters

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WX-203 146S30, 32 Gal WELL-X-TROL Well Tank Stand low pressure upstairs


There is a schraeder valve at the top of the tank. Check the air pressure with a tire gauge. It should be two psi lower that the cut in pressure. eg: If you have a 40/60 pressure switch, the tank should read 38 psi.If it is lower, charge it up with air. If it loses the air again, the tank needs to be replaced. The gauge at the tank is rarely accurate so I would an outside sillcock pressure gauge to determine your system pressure so you can set the tank pressure properly. Good luck!

Apr 25, 2017 | Water Heaters

1 Answer

Why loosing pressure very fast when I open the hot water tap?


I would put a pressure gauge on the supply line coming from the source be it a public water system or a well. If your on a well your pressure tank is waterlogged or defunct. If you have constant pressure from the source and your hot water is the only water losing pressure I would think the water heater is old it may be limed up on both income and outgoing h2o.

Nov 05, 2015 | Water Water Heaters

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I have a ideal mini c28 which is loosing pressure when the boiler is off, but when topped up and heating turned back on the pressure keeps rising


According to the laws of physics, pressure will rise as temperature increases and falls as temperature decreases in a closed system. The issue is how much does the pressure change for a given temperature change. The more air in the system, the less the pressure change, and vice versa. Vent your registers (pump must be off). If they are noisy from water flow, vent again. Let the boiler come up to temperature and shut itself off. Check the pressure at this point. If it is less than about 15 psi, add water to get it to 15 psi. If it is over 15psi, vent the surge tank to get to 15 psi. If your surge tank is totally full of water, you will have to find a way of getting air into it. Always check your pressure at the same water temperature to really know if you are losing water from the system.

Oct 17, 2014 | Water Heaters

1 Answer

How to top up the pressure on the boiler


According to the laws of physics, pressure will rise as temperature increases and falls as temperature decreases in a closed system. The issue is how much does the pressure change for a given temperature change. The more air in the system, the less the pressure change, and vice versa. Vent your registers (pump must be off). If they are noisy from water flow, vent again. Let the boiler come up to temperature and shut itself off. Check the pressure at this point. If it is less than about 15 psi, add water to get it to 15 psi. If it is over 15psi, vent the surge tank to get to 15 psi. If your surge tank is totally full of water, you will have to find a way of getting air into it. Always check your pressure at the same water temperature to really know if you are losing water from the system.

Sep 24, 2014 | Water Heaters

1 Answer

I have a recently installed richmond water heater. When the shower is running and someone turns the faucet on in the kitchen the water gets drastically colder in the shower. We didnt have that problem with...


Which type Richmond water heater?
Is this a tankless water heater or tank-type?

Tankless are notorious for 'cold water sandwich' under exact conditions you describe. You might need tankless with larger BTU burner.
Don't install a tankless.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

If you have tank-type water heater, then I suspect a clog in the hot water line, or single-handle faucet cartridge in show is going bad.
Same problems can contribute to tankless problems.
http://waterheatertimer.org/Low-hot-water-pressure.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Aug 06, 2012 | Rheem Richmond

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The water is not draining when i hook the hose up to it. how do i drain?


Is the water pressure on to the heater? If the water has been turned off the heater will not drain unless you open another valve to allow air to enter the heater as the water drains out. You can do that by turning on any hot water faucet in the house or by opening the safety pressure valve located on the top of the water heater. If that does not release water, check to be sure your hose from the heater is not kinked anywhere. If pressure is on to the heater and water does not come out, you will have to take some more drastic actions to drain the tank. You may have to actually remove the faucet at the drain and dislodge calcium build up in the bottom of the tank. If it is that severe, I think I would just leave it alone rather than take a chance of damaging the unit.

Oct 13, 2010 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

2 Answers

Pressure valve releases sometimes , I lose a good bit of water. When i tap the valve handle, it shuts off.


The pressure release valve is a safety feature. If it is leaking alot, it could be that the valve needs to be replaced or it could be that the high temp. shutoff in the hot water tank is malfunctioning.

Apr 20, 2009 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

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