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good stuff....i will get on with some bigger pipe work then 8) bit of a bummer as i have to get behind the kitchen units to get to the mains but at least it will give me summat to do and save money for the hot water system :)

Interesting stuff guys, thanks :wink: I didnt explain myself well.....i understand the boiler will have a required dia. feed pipe going into it but i was wondering about things like showers running off a mains pressure system. if the cold feed coming in is through different pipe to the hot...

i will have 2 ensuites and a bathroom to feed. so your saying to use the wider dia. pipe and T off with 15mm? I'm just thinking while im at this stage i might as well do it the best i can instead of T'ing off or extending the existing 15mm. Im going to have a mains pressure hot water...

Well i dont know the flow rate but the pressure was tested a while a go at about 3.5bar. pretty high i guess as the plumber was suprised.

Have had an extention built with an ensuite. Im in the middle of planning the pipe work and whilst im saving up for the central heating system i was looking at installing the cold feed myself (i have some basic plumbing skills) on looking through the house (1965 build) i see the cold feed...

LOL im back again :) The system has been running all night. the pump appeas to be pumping ok but then i cant be sure. I have 2 and a half rads working. one of the rads downstairs is working fine....the other is stone cold. the bedroom rad is half working and appears to be filling from...

just done that :) its the downstairs rads that arent getting warm, one is luke warm and the other is stone cold so far....not even any warmth in the pipes. Mark.

LOL i guess im missing something here...but i did jump the gun a little and at last check i have 3 out of 4 rads warming up.....im just sat here willing the last one to join the party. Mark.

Ok the B port side is getting heat...that means the HW and bathroom radiator. unfortunately the A side isnt getting anything yet. its hot from the port to where the pipe disapears under the floor but so far nothing is reaching and returning from the 3 rads on that side. one rad has a luke warm...

Well i think i have a little sucess :lol: I found a blockage above the pump....i managed to pock some wire up there and free a good lot of sludge!!!!! at the moment i have a system thats flowing water....i can hear it 8) i dont know how much of the system is getting heat yet but the HW...

Thanks again guys for the replies....the pump was brand new yesterday....i fitted it just before posting here. i have seen that both gate valves are open too and the pump is fitted and wired the correct way around. i have brought i new pair of gate valves as one has started to leak. i bled...

thanks for the replies.....the pump is ok as its a new one. well i hope its ok with it being new. it isnt noisey but i will have a look at it later. i thought i could wire the port up like you say but needed someone to confirm this for me.

i can only assume that they are ok as both are open and i cleaned them out so im guessing if they are open to full width they let water through. what else can be wrong with them? So this is the checklist..... Pump ok 3 port valve ok rads drained flushed out system refilled and bled...

Well if i cant figure it out soon the professional will be called, it just hasnt got cold enough for it yet :lol: the pump valves? do you mean the isolators either side of it? if so they are fine. Also you have put my mind at rest about the 3 port valve although it doesnt help me much in...

Hello this is my first post on here and it might be a long one :wink: I have an open vented system that must be well over 20 years old running 4 radiators (2 up, 2 down) using a Baxi back boiler. I know that the best option is to replace it but the house is being renovated and extended so im...