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am i right in thinking to have a combi boiler you NEED to have decent pressure/flow rate though???

oh nice one, sounds like a good idea. thanks will do that. actually can i just clear something up-the lever when put onto manual opens a 2 port valve up, but on a 3 port mid does it open it up fully or just to heating position? i need to hae it onto manual when draining doiwn the system...

hmm - if i can't get ht eold olive's off easily i will do that then. what will wire wool do though except make the nut more shiny? actually can i just clear something up-the lever when put onto manual opens a 2 port valve up, but on a 3 port mid does it open it up fully or just to heating...

ok thanks for your help-good point there. i think i have got olive puller's wrong! I just though you unscrewed the nut and put the olive puller over the olive and removed it that way. didn't know the nut also was covered by the o. puller!

can i change a like for like motorised valve and used the old nuts/olives when tightening instead of removing the old olive's? or will they leak when re-tightened to the new valve? i did this when changing rad valves before and it was ok? just a thought to avoid having to saw off old...

you want equal pressure on your hot and cold for your manual mixer shower, but if you ever have cold mains and gravity hot then you must have a double check valve on the 2 supplies, eg with a kitchen mixer tap.

oh why not diverter valve olives? they are 22mm i believe?

ok i'll try that when replacing-just to prove it is knackered!!! i see the pump port (AB) - its the short piece of pipe from the pump outet side to the 3 port valve. on the other point i thought a hot and cold feed washing machine was not acceptable for a washing machine/dishwasher as the...

you could either have an electric shower (mains cold feed only) or take a separate cold feed from your cold water tank for your gravity feed cold and a surrey flnage from the top of your hot water cylinder for your gravity hot - that way you will get an equal balance of pressure. how big is...

hmm so does it just fit normal 15mm copper pipe compression fitting olive's?

yep it's knackered !! it has been like it since last winter but wasn't too bad, i mean it wasn't too annoying! going to change it now though. seco what do you mean blow up the pump port? i know there are ports A B and AB - what's the pump port? what will this achieve???!!! sorry if i...

usually the manual air vent is at the highest point, just tee'd off above the primary flow to the hws cylinder. bleed the pump and maybe even disconnect and replace/clean out.

ok when you do this, measure the siphon height first to get the right size replacement and also be careful when taking ghe doughnut washer off, if it splits/cracks water wuill leak from the cistern/pan join !! you might then need a new replacement (a like for like one) as not all doughnuts fit...

might buy one then. i had to remove old olives froma compression fitting on a pedestal basin a few months back and it was a knightmare!! took me an hour to saw them off carefully with a hacksaw as i was scared i'd pinhole the pipe!!

sorry i am getting a bit confused here!! :) yes the manual lever is to open the alve (or in the case of a 3 port mid position valve) to open it up to mid position to allow heating if the motor fails. (also to help drain down the system) no dent in the cover, so will be draining down...

seems like the diaphragm has worn in the siphon - you will need to buy a new siphon (a bout a tenner). make sure you get the correct size one though, eg 8" or 9.5"

that is why the manual lever can be opened in an emergency to allow heating circuit to open if vale spindle sezies up i suppose? thanks for your help. will have to get a new valve. about 60quid!!! :( o well!! i did hear that on any motorized valve if the spindle/paddle goes then the whole...

been meaning to ask about this for a while now. are olive puller's any good? I have seen them in screwfix and they are about 20quid! I have in the past had to carefully saw off old olive's before and wondered if these olive pullers are as good as they seem? anyone got one?? ...

hmm yep i hav heard the spindle can become seized. so a whole new valve will be required, means draining down the system and tieing up the f & e float valve arm!! the valve is i presume about 20 years old, it is a honeywell v4073a (common and best choice i believe). it has a silver casing...

if your f & e cold feed pipe is blocked then this is a horrible problem and you may have to replace the section of pipe.