Changing a heating system pump gate valve?

Question

I have a leaking gate valve beside my heating system pump.
Anyone have any tips for changing the valve.

Would a ball valve be a more reliable replacement?

The leak is from the joint between the valve body and the screwed in part of the valve, not from the stem

Answer 1

Gate valve a better choice ball type valves leak the next time you use them, + shorter in dimension. To stop your leak part close the valve then slacken the body / housing 1 - 2 turns, pick out old fibre washer and then wrap thread tape around 6 - 8 turns and tighten up open valve and that should be OK

Answer 2

Central Heating Pump Isolation Valves

Answer 3

If this gate valve is leaking at the top of the valve, all you have to do is Take the handle off the top, Undo the nut on top of the valve, and underneath this nut is what is known as a gland nut. Tighten this nut down just tight enough to still be able to turn the valve head. This should stop the leak . If you have to change the valve Then you have to turn off the water supply to this valve. You can fit a ball valve type of valve if you want to. Don't overtighten the nuts on the new valve. Just an extra quarter turn wheen they are tight.

Answer 4

ball or gate equally reliable for this pressure and temperature rating.
Try to get a direct replacement if possible because you do NOT want to be messing about with altering pipework at this time of year.

When you say the valve is leaking, do you mean that the leak is from the spindle, where it enters the valve body? - because in this case, all that is required is to tighten the gland. There should be a hexagonal nut which compresses the gland. Try tightening it.

Answer 5

You do not say where the valve is leaking from ,if it is leaking from the stem the gland nut needs tightening a little or the pipe joints need tightening,or it could be the fibre washer needs renewing on the body .
It is very rare the valve body leaks

Answer 6

if the leak is only on the stem of the valve undo the nut wrap about 5 turns of ptfe tape around stem push down and tighten nut this should stop leak if leak is elsewhere drain system and replace both gate valves .don't use ball type they give more leaks

Answer 7

very generic type question, not enough information given to make a an opinion, so I will answer the second question. Yes a ball valve would be a more reliable replacement. There is nothing to wear out in a ball valve.

Answer 8

unscrew the handle [should be a phillips head screw]and take just the handle off you will see a nut grab an adjustible wrench and tighten this nut just enough to stop the leak dont over tighten the nut , and a ball valve is the way to go there 100 times quicker than a gate valve

Answer 9

you will have to drain the system down ,unless you have a pipe freezing kit no easy way of doing it I'm afraid,proper pump check valves are available,and are better suited for the job,they do have like a ball inside them but are not called ball valves, they work on the same principle as a gas valve

Answer 10

a new ball valve would be better remember to turn off the main water isolation valve first usually found under the kitchen sink and also get a roll of PTFE tape for when you are connecting joints back up