How To Replace A Float Valve
Replace your float valve
If your unlucky enough to have water tanks in your attic / Loft area the chances are you will experience the external over flow dripping water at some point, this does need to get sorted earlier the better, worst case is the dripping water will freeze and block the overflow leading to overflowing water tanks that can find its way through your ceiling and thats going to hurt your pocket.
Why Is It Leaking
Water tanks which are out of sight (in the attic) tend to get forgotten about, the tanks feed your hot water system and your heating, which is which, so the larger of the two tanks normally feed your hot water cylinder and the small tank is the header tank for your gravity fed heating system but regardless of what they are for for a minute both tanks will have a float valve fitted to them, this valve automatically fills the tanks when the level starts to drop for example if you fill your bath or the kitchen sink with hot water or you have a leak on your heating system.
Float valves are very reliable made of brass and will normally last for years but eventually they will start to stick due to ware or limescale, one this starts happening they fail to shut the water off and the water rises in the tank eventually finding its way down the over flow pipe.
Repair Or Replace
Repairing these float valves used to be the norm years ago because the cost to replace was quite high but over the last 10 years or so the cost has come down making repairing not that cost effective, my opinion is to always replace the float valve and the float then you can forget about it again for another 10 years.
Can I Replace Myself
In the plumbing word replacing float valves is probably one of the easiest jobs around and is a job you could do yourself, Before you start just make sure you can turn off the water supply to the valve or turn off the mains water at your stop tap, as this is a serviceable part you should find an isolation valve which will isolate the water just to the valve if there isn’t one then it would be a good idea at this point to fit one and again not a difficult job for the DIY’er.
Ok you first need to buy a float valve and float from your local plumbing or DIY store, so you need to ask for a float valve part 2 here in the UK the size is normally 1/2 inch (as the picture above) these will be a direct replacement to the one you have fitted making the job a doddle simply remove the body of the old valve replacing it with the body of the new one, There is a great instruction video on this job which I have posted bellow. if your feeling this is a job for a plumber then your going to pay 1 hours labour plus the parts to get the job done and i would say £50 to £60 should cover but as always as for a quote first.