Garden Tap - Low Pressure

[BennyC]

Morning All,

Following on from here I seem to have intermittent low pressure to my garden tap.

I have confirmed it is not the tap, which was replaced around 9 months or so ago, by testing flow with it removed and it's no different.

Yesterday I replaced the Stopcock as it had leaked ever so slightly from the top thread since I moved in so was often shut-off except for when the garden tap was in use.

Initially this made no difference but after clearing some air from the system via taps & toilets in the house pressure seemed to have returned yesterday evening.

However this morning it is back down and possibly even lower than it was before. Taps, showers & toilets in the house are all fine and mains pressure is unaffected.

There is a double-check valve which is the only thing between the stopcock and the garden-tap but being inexperienced with plumbing I'm unsure if this is likely to be the issue? or if it's possibly just more air?

Thanks,

BennyC

 

[Burned_Alive]

I'd expect the check valve is not fully open or is faulty and not opening fully. It should be adjustable via the nut so have a fiddle.

You may need to adjust it while someone monitors the water pressure as quite often these valve have a central spindle, so if you go past the centre point you start to constrict the water flow again.

Once you've found the right point, make sure you mark it.

 

[BennyC]

I'd expect the check valve is not fully open or is faulty and not opening fully. It should be adjustable via the nut so have a fiddle.

You may need to adjust it while someone monitors the water pressure as quite often these valve have a central spindle, so if you go past the centre point you start to constrict the water flow again.

Once you've found the right point, make sure you mark it.

Thanks, I was planning on giving it a Russian kiss with a spanner too to see if perhaps some debris might shift.

Sounds like adjusting it is a simple case of turning the nut so I’ll see how that goes.

I did think I could thread a 15mm coupling on to the SC which would attach to the garden hose, bypassing the DCV and SC but that’s not necessary yet.

 

[BennyC]

Check valve had disintegrated with parts stuck in the pipe between the SC and it and also it and the garden tap, which had 2 90 degree bends.

Got creative with a bike gear inner, outer housing and also using the borked CV to attach the garden hose which I then filled with water and blew through to flush out the restricted section of pipe.

All that was left...

Golden now

I was able to release a few Tectite fittings using an adjustable spanner and slipping it along the copper pipe to push the gripper/seal in.