20 Most Recent Watts Regulator Temperature and Pressure Relief Valve 40XL-4, 1" Questions & Answers

Even a small amount of crud on the rubber washer/sealer can cause the valve to seep. Some valves can be taken apart and cleaned but it will be better to replace the valve. They can be found on line for around $12 or more. You will have to shut off the water in take valve and drain most of the system unless you have a main line shut off valve so the system wont drain back into the boiler. These valves are usually set at 30PSI.

Watts Regulator... | Answered on Oct 16, 2013

Hello The 740 is NOT EVER!!! adjusted.It is factory set.It can be purchaced at any PRE-set rating from 30-75 LBS.You MUST match the rating of the old one.If in doubt use the 30# to be safe.

Watts Regulator... | Answered on Sep 09, 2010

Turn it clockwise to increase pressure on a watt's pressure relief valve. You will have to gradually adjust and check pressure till you get it to desired pressure. You don't want to exceed safe pressure due to damaging water lines or fixtures.

Watts Regulator... | Answered on Jun 15, 2010


Watts Regulator... | Answered on Nov 13, 2009

On the top of the regulator is a stem/threaded rod with two nuts on it.

Loosen the bottom nut and that will allow you to turn the stem, which adjusts the pressure.

clockwise usually increases pressue, although I have encountered PRV's (Pressure Reducing Valve) that decreases pressure with a clockwise turn.

When A PRV starts malfuntioning, they often cannot be adjusted and need to be replaced or rebuilt.

Watts Regulator... | Answered on Oct 03, 2009

That depends on the voltage. Divide watts by volts to get amperes.

Watts Water... | Answered on Dec 09, 2016

There is a pipe to the outside. Is this letting out water drip by drip? If so it's the pressure relief valve in the boiler. Trace the pipe back to find. Some of these valves can be dismantled and cleaned once removed. It is usually bits of deposit inside.

Watts Water... | Answered on Sep 18, 2014

As a Backflow Tester, I have to recommend calling a certified Tester with experience in repairs. There are a few thing that could cause this such as debris stuck on the #1 Check disc (which usually means repair parts) or a nick on the Relief Valve seat. The rv seat is stainless steel and just pops in the bottom of the valve with an o-ring seal but unless you have experience at this I suggest you leave it to a professional as you could easily damage other parts or reassemble improperly.

Watts Water... | Answered on Oct 12, 2012

look for display or control board if no buttons then cant adjust

Water Heaters | Answered on Oct 22, 2020

Automatic battery chargers have complex circuitry that is difficult to test especially when designed and built in a compact package and repairs are best entrusted to someone geared to such work which is outside the scope of general electronics.

On the plus side, as long as the intelligent circuitry is protected against mains borne surges and spikes the automatic charger is somewhat self-protecting against over stress and will tend not to even attempt to charge a defective battery, a sulphated or overly discharged battery.

I suggest you first check the battery or batteries to ensure they are healthy and have some charge so the charger can "see" them before condemning the charger and also check the connections to the battery that must be virtually perfect...

Water Heaters | Answered on Oct 05, 2020

Depends on the problem you have .if you are unable to fix it the option of calling a plumber is there .

Water Heaters | Answered on Sep 07, 2020

When the noise occurs when there is no hot water being used, it's likely there is a vacuum that's siphoning water away from the unit and causing loud noise and vibration. ... Another common problem that can create noise in tankless water heaters is a dirty flow sensor which controls how much gas is sent to the unit.

Water Heaters | Answered on Jun 24, 2020

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