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What does a Y strainer do? I removed one that was before a check valve as i thought it was only being used as a reducer as a bodge up. It looks like model no. PEX 050 on the following link..... http://www.plumbex.co.uk/check_valves.html

I have now changed the salamander to the side of the salamander and the rest of the hot outlet is on the top that goes to the downstars bath, kitchen and hand basin. it worked last night, took a while for the water to pump upstairs, i guess air lock, but then it seemed ok, i will test again...

Forgot to say, i'm not sure what the full bore isolating valves are, poss there are none. not sure how to prime the pump ?

I took the pump side off the top of the salamander, counld that be it ? The water taps are nearly on level peggings with the water tank. I only went to change the immersion, doing a good deed for mother-in-law !

Yes, i put the check valve with the arrow facing away from the pump(towards the upstairs) Not sure how air can get into pump as it does pump, i thught it would clear air it's self ?

Hi, I fitted a new immersion boiler(old one leaked), thats ok, the hot water supply was fed about half way down the old immersion and the new one didnt have a hole half way so i got a 'salamander S type top entry flange'. It goes through a powered pump, then a 'check valve' then to the...