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If it's the (black) PRV valve that I'm thinking of then the top will easily unscrew from the base to reveal a filter (which will need a clean). Wrap a little PTFE tape round the thread before you put it back though (bugger's for leaking)! Don't forget to turn the water off first. servotech,

Firmly grasp the flush valve and give it a twist anti clockwise it will then lift out. You should be able to put it back the opposite side so the cable is on the other side of the cistern. I've also prised the white top off this valve and added a couple of own made tiny lead clips clipping...

Have a look at the cold mains stop tap making sure it's fully open. Might not be the fix this time but I've certainly come across a few situations were it as been. servotech,

I've often come across this problem when a gravity hot water system as been converted to a combi boiler and a lot of 22mm/3/4 pipework from the old gravity system as been connected up to (this gives a little bit of water storage in the old large pipework which soon tapers off) more noticeable if...

An old joke that we used to say back in the day is rhat a plumber is a doctor with his brains bashed out!! :lol: :lol: :lol:

You are indeed using the boiler wrongly. The hot water cylinder is a vessel for storing hot water until it is needed. Just chill out and leave the boiler switched on letting the cylinder thermostat do it's job of supplying you and your family with lashings of hot water (it cannot do this...

General wear and tare (sticking). I almost wrote wear and tear :) servotech

yes, water out. I'll balance system and see what happens. Thanks to all of you for suggestions. In that case I think you need a new pump - it's quite common the old pump still working but is not strong enough to circulate the water to the new radiator - balancing is a good idea although...

I reckon in years to come mental torture through disaplinary hearings will be viewed as beingmore damaging to individals health than the good old physical torture.

Change the whole 3-way valve. Heats not getting away from the boiler when it's in the h/w only position it's what we experts call "lock out"! servotech,

No need to turn the water off to re-pack the gland with ptfe. Put a small container under the valve to catch a few drips. It's not leaking from the stoptap body. servotech,

A high level radiator won't bleed properly whilst pump is on (although it should'nt really be a problem with a pressurised system). To repeat Tonys question "do you get water out of it when you bleed it"? servotech,

Might seem a daft question but have you vented it with the pump off?

Had a call to an hot water unvented system yesterday because the hot water has become discoloured (a light yellowish brown). Pressure was down a little on the heating, but apart from that I could find no other fault. It's a Calorex system. Any ideas?

The customer has an electric shower (this is one of the customers other complaints) due to this extraordinary high water pressure the solenoid valve in the electric shower still keeps spinning (letting water through) after being switched off! I just wasn't sure about if the really high...

Had there been any cheapo mixers fitted here this would also have been my first thought too; alas no taps at the property are mixers. servotech

They are 3/4" globe taps and they've been obsolete for years! The problem that you're going get with conversion kits on those old taps is that the spindle won't be long enough and will run of of thread before the washer makes contact with the seating - I think you could be struggling with...

Been called to a property today that is suffering all kinds of plumbing problems due to excessively high mains pressure. One of the things that I'm struggling with is when I open any cold water tap or flush the loo it causes the combi boiler to fire up and briefly cycle. I'm gong back next...

When you open up the cold supply it will take priorty over the hot supply because the cold feed is taken from it before it reaches the combi (where it will be restricted anyway). It's not always this noticable though; I would have a look at your mains stop tap making sure that it's works and...

No part number, just a phone number (which usually means your going to get ripped off big time). Non the less I'll give them a call tomorrow. The cylinder is a "Range Tribune HE". I'm beginning to think that they want the customer to take out a service contract with them and are...