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Sorry if I wasn't too clear. I think its the type of set up where you'd see an air seperator, but there isn't one. Surely the flow will try to go straight up the vent? Feed x xVent x x x 150mm x xxxxxxxxxxx...

Saw a newly re-located open vented cylinder today with a couple of things I thought odd. Firstly the feed vent set up was 'H' shaped. The flow came up and became the vent, the feed came down and became the flow. The link (flow) was 150mm and the pump on the exit leg of the 'H'. Isn't this a...

Needed to drain a system today. Only drain cock in lounge over lovely beige carpet. Plastic down, old towel down, hose attached, open nut- nothing coming out. Tap tap. Bang bang. Nothing. Undo nut some more, then some more, then right out. Have just the nut, pin and plunger still in there. (Was...

By the way, Chris- I've always wanted an excuse to buy a monster wrench, now I have one.

Useful tips chaps, many thanks.

Am I alone in finding it really difficult to get old ones out without wrecking the cylinder? Any little tricks from you chaps with mucho experienco? Grassiarse. (On the beach- sandia**e).

You sir have been very helpful. Shame your Afgan countrymen fight dirty and love goats. We'll be back!!!!!!!!!

So is that roughly 20kw and over= 28mm?

Well that's what confused me. The one's they're looking at presumably will soak up all 15KW from the Suprima from cold. Don't get the 3KW guide bit though. Just a base minimum perhaps? So if the boiler ends up being upgraded- at what KW do the primaries need to go to 28mm?

Apparently does fine at present. Please expand Kev (your answer that is!)

If you need a new one keep away from Travis P. They tried to charge me over £60 plus vat for one. WRAS approved admittedly but hey- this guy should have had a horse an a pistol!

.....should the primaries from the boiler go to 28mm? I ask because of a query over a Suprima 50 that runs an average 3 bed semi with a kitchen extension that is now in the process of a loft extension. A HS Megaflo (170 or 210) is going to be fitted and the owner is going to see if the boiler...

Thanks Felix. Let me see if I grasped that? With the valve set to manual (mid pos?) the boiler won't be getting a call for rad heat if the cyl stat is satisfied even though the programmer is showing demand? So the boiler may not have tripped out (this time), it could just be idle because the...

It gets worse. I was able to get it going with the valve on manual but the boiler locked out again shorty afterwards. Got it going again the next morning but same after a while excpt that now the reset button is in the 'on' position but nothing happens. Programmer showing call for heat and hw...

Dear Gurus, Please enlighten me as to how you can tell if the motor has gone or the valve itself? Potterton profile cut out on overheat. With programmer demanding CH and HW no flow to rads past 3PV. Flow to both if set to manual and no overheat. Thought there should be flow whatever the valve...

But its not putting cooler water back into the pipe that will feed the next rad, its going to the return. Only temp loss on the feed will relate to pipe length and insulation until all rads are fed?

Worcester combi. Drained down twice in last fortnight for rad work. Dirty water in system I was told. Boiler now started howling when it gets hot. Occurs quickly when on hot water, takes longer when on CH. Pump gets too hot to hold but spinning. Howling varies if pump speed reduced. (Book says...