Low water pressure, what might be wrong

BobProperty

adypem wrote: »

.....One thing I did to get around it was to fit a shower pump so there will always be constant pressure.

It's a combi boiler, you can't pump it.

Check that the local Water Utility haven't been working nearby and introduced some crud into the local pipework.

shopaholicjules

Hi
Thanks for your replies.
I have spoken to the water board who say because it is the hot tap, nothing to do with them.
I have turned the water on and off from the stop tap in cellar and on the boiler, still to no avail.
Any other suggestions as to what I could try as I cannot find the plumber who fitted it (only in last year and a half), maybe he has retired.
If at all possible I don't want to hae to call a plumber, I am in the middle of selling and buying house and can do without the expense but the fact the water runs so slow turning the boiler off is driving me up the wall.
Please tell me i laymans terms as I will need step by step instruction.

Thanking you kindly
Jules

Canucklehead

Hi

I think you need to get someone in unless you have the know how to disconnect the cold inlet to the boiler and establish weather you have good pressure at that point. Otherwise it's all just guesswork.

Corgi Guy.

shopaholicjules

Thanks
Ok, the boiler is a Vokera. Underneath there are two things with no taps on which cannot be turned or moved, then there is a yelloow knob type thing, should I try turning this, then another that doesn't move and the last is a water on/off, tried this one and it does turn the water off.
Underneath all of this there is a water tap to put more water into the boiler.
Are any of these the one I should be trying.
Thanks

Canucklehead

Hi

The yellow one is gas.
Two pipes are 22mm, central heating flow and return.
Two pipes, 15mm, one is mains in.That's the one with the filling loop on it.(the other end goes to the heating return.)This (the main in) is the one that needs to be checked to see if it is running properly.If it is, then you are looking further inside the boiler for filters / restrictors that would reduce the flow.
The other is hot out.
You might see another one which is 15mm and goes to outside and is the pressure relief pipe.
If you have an installation manual then that will make life a lot easier for whoever delves around it.
If you don't really know what you are doing then it's not worth trying as you have 230 volts in the boiler .Even if you turn off the power you might have a leak or spray water around the boiler which could get into electrical parts and cause even more problems when you switch on.

Corgi Guy.

delieu

I have recently refurbished our bathroom, everything fine except the addition of a new monobloc tap on the basin instead of two seperate taps. Result; Hot water just trickles. Should I go for a Dual Flow tap? Would this improve the situation?

latecomer

If there are inline valves make sure they are fully open. Is the water to the bath still good pressure? Did you modify the pipework in any way?

PS It would probably have been better to post a new thread rather at the end of a 3 year old one

keystone

You do not have a pressure problem you have a flow rate problem and I'm afraid its caused by what you have done.

You have installed a monoblock so it will most likely have 8mm flexible tails - restrictive to flow, it probably has 1/4 turn ceramic disks - restrictive to flow, if you've followed water rags you will have installed isolating valves, bog standard ones straight off the shelf at the sheds have reduced bore - restrictive to flow. Thats why your hot tap dribbles but the universal con prolifereated by the manuafacturers and the retailers for own brand goods is the "works down to X bar" labelling but tell you nothing about flow rate at X bar which is the key factor in low pressure systems. Sorry but there it is.

A dual flow tap isn't going to make any difference if i'ts installed in the same way.

Agree about new thread too - can a mod split it?

Cheers