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Re: How do you inscrease the pressure setting on a watts...
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.
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The tag should be on there, not having it won't cause you to fail inspection might want to ask whoever did the install if they removed the tag.
In case your wondering here is what the "yellow tag" tells you
front view of a typical "yellow tag"
back side of the "yellow tag"
Here is some safety literature from Watts a major company that designs, manufactures and sells an extensive line of flow control products for the water quality, residential plumbing & heating, commercial and OEM markets.
The relief f valves are preset for something like 150 psi. I doubt you have that much water pressure. I would just replace the valve. There is NO adjustment.
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.
Is the pressure in the boiler higher than the set pressure of the relief valve? If it is, there is a problem that the relief valve is trying to correct.
If not, did you try making the valve open?
Be careful, but step back, lift the lever and briefly let the relief valve discharge into a bucket of some sort, maybe you could put some old rags in it to keep from spraying out at you. If there is sediment in the valve this may flush it out.
Hello,This valve is pressure only.The model XL is pressure & tempature for a hot water storage/heater tank(has the stick).You need to know male or female thread and the relief # setting of the old one.The info is on the tag on the old one.
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.
A vent hole is required on a pressure relief valve to allow excess 'dangerous' fluid or gas to escape as required in a controlled manner normally via another pipe.
Hi, it appears you have a defected relief valve. you can try one solution. lift the handle on the relief valve and let some water out. sometimes that can flush out materials thats blocking the stem in the valve. if it's still leaking it must be replace.
If this doesn’t work for you please write back.Thanks,
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