Search results

If the expansion vessel for a unvented hot water cylinder was fitted to the hot outlet pipe instead of the cold main going into the cylinder would this pose any problems. As far as I can see it will still allow expansion of the heated water

Were currently working in an old farm house and we have to add to the heating circuit, on the existing circuit there is 21 rads and a hot water cylinder. Now the boiler is sited approx 5m away from the airing cupboard where the C/H pump (25/60) and zone valves are, everything in there is fine...

Yeah water to inlet of pump on both sides. Pump plugged in and pump lights up.

The pump doe's nothing at all when the shower is turned on, I get nothing out of the shower unit at all.

I got called to a faulty shower today, Existing shower pump has gave up. The pump that's fitted is a salamander negative pressure 1.5 bar unit. Now the pump sits below the storage tank by at least 2.4m on the floor below, The shower head is above pump height but below the storage tank, Am...

It's a 35HE Mynute that's going to be installed. Regarding pipe resistance, We have the following 20m 15mm pipe 6 15mm elbows 2 15mm tee 2 22x22x15 tee 2 angled valves The radiator is a 1000 x 600 k2 (1.7KW approx) The pipework above runs from the main 22mm flow and...

I've had a look through the links and have done a calculation I believe is correct for the index circuit/rad. The resistance for the pipework/rad only come to 0.2968, so that's less than 1m head resistance. So depending on the loss across the heat exchanger the 15-50 might well do. If I...

Thanks guys, I'll have a read through the links later. The house is an old Victorian number, high ceilings, no double glazing etc. The radiator output comes to just over 30kw, we were talking pump sizing today but I couldn't offer anything. The pipework is 28mm,22mm and 15mm to...

On a large property say 20 rads with approx 30kw heat load what size pump would be required to allow 30kw to be moved from the boiler. Would a standard 15-50 cut it here ?

closely spaced tees ??

Is it possible to fit an additional pump to a system boiler if the boiler is fitted to a large property with lots of rads. The boiler in question has a 15-50 I believe and we're looking at fitting a 25-80 also. Does the internal pump work along side the new pump if so.

So if the pump is on a timer and is off for say 8 hours through the night would this suffice. The spec is for a pump with timer, I did notice that.

Longest hot water run is approx 20m from cylinder. I wonder how many other new builds/renovations are completely plastic installs.

The answer here is a complete re-pipe of the hot water service then or removal of the secondary return. At what point would a property require a hot return, I thought it was a bit overkill for domestic use myself.

Can Hep2o be used for a secondary return in a domestic property, I had to first fix a rather large property today and all pipe work is Hep with copper on show. I had a look over the drawings but nothing said about copper for the return circuit, I thought plastic wasn't allowed on the H/W...

I'm needing to stick an additional radiator in one of my rentals, there's 10mm pipe running past the intended location of new rad under the floor. This 10mm feeds a 1000x600 K2 (1.7KW) Can I cut into this to add a 500x600 K2 (800W). The 22mm flow and return is is a good distance away...

I've no gas safe number or I would be joining. So the trainer is wrong, he was adamant too, I said that we very seldom carry out tightness test then he went off on one.

I was just in for my 1st day of CCN1 today and few things the trainer said contradicted what my gaffer has told me and done in the past. Namely the topic title, The trainer said this is mandatory and how could you issue a safety cert without carrying out a TT. So all these CP12's my boss...

When I was pumping it up the air was coming out of the air release valve, I closed this thinking it to be the problem, the pressure gauge on front of the boiler then began to rise. As I say, I had already pumped all the water out the expansion vessel, I then opened up the PRV to discharge the...

When recharging an expansion vessel today it wouldn't hold air pressure so I assume it was leaking into the heating circuit. When I first tried the vessel no water was coming out valve but there was no air either, I attached my pump and blew a lot of water out but now the vessel is empty but...