Megaflo Dripping Valve

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toftaj

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My megaflo has a cold water combination valve (part no 95605 021) which is dripping.

Untitled

Untitled


The leaking valve is towards the top of the photo. I have to turn off the manual valve just above the dripping valve to isolate it and stop the drip.

I'm assuming that I have no choice but to replace the leaking valve, but I'm wondering if I can do anything with the other two valves on the system: an 8 bar SYR valve and a reliance combination valve. Both of these will release water into the air gap if they are twisted.

I'm only after a short term fix to allow me to get through the next few days until a plumber is available.

Any comments would be appreciated.
 
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You dont say where its dripping and the photo does not help.

Any work on an unvented has to be by a qualified person.

It sounds to me that you want to fix it yourself. You can only do that if its something like a compression nut joint leaking.

Until you call a suitable plumber you can just isolate the supply as you have been doing when HW is not required to be used.

Tony
 
probably leaking from the top of the pressure reducing valve. common problem im finding with megaflos.
nothing you can do but get someone qualified to replace it.
 
I've seen a few people posting with a megaflo cold combination valve drip problem. :(

Unfortunately nobody has posted a DIY response.

In one megaflo manual under 'User Instructions' there are instructions on how to "Clean the strainer" within the cold combination valve. I followed those instructions - well it did say 'user instructions'. I took particular care to remove the buildup of limescale on the rubber washers while not damaging anything. AND IT WORKED! :LOL:

The text of the megaflo instructions is:

"8.3 CLEAN THE STRAINER
The strainer is incorporated within the Pressure Reducing Valve part of the Cold Water Combination Valve (see Diagram 3). To inspect and clean turn off the mains water supply to the Megaflo unit and open the lowest hot tap in the system to relieve the pressure. Unscrew the black cap from the Pressure Reducing Valve and remove. The strainer will be removed with the cap, wash any particulate matter from the strainer under clean running water. Replace the cap assembly ensuring the sealing ring is correctly fitted. Do not use any other type of sealant. Close hot tap, open mains stop cock and check for leaks."

When I first turned the water on again a flood came out of the valve...but a quick tighten of the black cap solved that immediately...I'd been too cautious tightening it in the first place.

Note that this is my experience - not a recommendation - and professional help may be wiser! It did however save me £120+ parts.

Bodge
 
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In my experience, when there's a leak from the end of the prv cartridge, the cartridge will be seized into the housing and can be a real pig to get out.
 
I have had the same problem, and having followed the instructions to clean the strainer (from the megaflo instruction manual) have fixed it. Many thanks for the tip. It works and only takes 2-3 minutes.
 
I had the same issue on my 2-year old system and had resigned myself to a costly repair...until I read this thread. The fix was so simple:

1. Turn the valve off above the leaking part (this is the mains inlet).
2. Turn on a hot water tap in your house - this releases the pressure. Only a little water will come out before it stops.
3. Unscrew the centre section of the valve (you'll need a big spanner/mole wrench). It comes out very easily.
4. Wash it under a tap (cold obviously as you've turned the hot off!).
5. Replace carefully. I tightened mine up a bit more than it had been previously.
6. Open the valve you shut in Step 1 and turn off the hot water tap.

Job done. literally took 3 minutes. This may not work for all dripping faults to this part but it did the trick for mine.
 
Thanks to pattersonn & b0dger for easy instructions and giving me the confidence to have a go before I spent any money. All that was need was filter to be cleaned letting valve move freely; and nut to be tightened. So easy and no need to empty tank. Don't know if everyone's problem was the same as mine but try this first before replacing whole fitting and/or getting plumber in.
 
b0dger said:
I've seen a few people posting with a megaflo cold combination valve drip problem. :(

Unfortunately nobody has posted a DIY response.
Bodge
Click to expand...

thats because it's not a DIY repair, any repair on a unvented cylinder or it's controls must only be carried out by an installer with a G3 unvented cert
 
You seriously don't need a plumber for this. It's basic maintenance that anyone can do. I followed the instructions above and worked for me too. I did add a new o ring to help push it all down and tighten up better when screwed back in but worked a treat. Was quite a bit of limescale in the filter too which I rinsed out.

There are a lot of plumbers out there saying you have to get a qualified plumber, and why wouldn't they? They all need to drum up business somehow! But seriously, this task is no different than cleaning the filter in your dishwasher and would you call a plumber for that?
 
Nobody's saying you need a qualified plumber to do anything that is in the user instructions, but anything that is not in the user instructions requires the expertise of someone with a G3 Unvented qualification
 
The reson for people recommending a g3 qualified plumber s not to " drum up bussiness" but that if done incorrectly maintainace on these cylinders can be very dangerous.

The "filter" that you removed is actually a pressure reducing/limiting valve that is adjustable. But adjust it incorrectly and you could create a dangerous situation.

Unvented hw cylinders should be serviced annually with your gas boiler to check all the safety controls. Unfortunately that is not widely advertised for some reason.

Cleaning the filter as you have done can be done by DIY as you say its in the user instructions, but I wouldn't recommend it and most wouldn't knowing what can go wrong
 
wow, wow and triple wow.
I had the same problem - a dripping megaflo cold water combination valve. It dripped though the floor into the dining room before i noticed. Anyway I called my plumber who luckily was on holiday. So I went to google and saw this old thread. A little nervous of following these instructions but did so anyway. It was so so so simple. Rinsed the valve, a few little deposits and thought that would not really achieve anything. Replaced the valve and turned the isolator back on and hey...no leak. Its been running all day and it is dry.
Thank you for the post. It has saved me a visit from the plumber and the replacement of an expensive part. Gosh, i still cannot believe how simple that was.
 
I had the same problem. The part #95 605 021 was dripping, I only noticed when the ceiling in the stairway was getting wet.
I turned the valve off, opened the hot tap and removed the part. Gave the bit I removed a rinse, it was full of crud. The wrapped some PTFE tape around the screw thread and screwed it back in.
No leak now! Brilliant article, thanks a lot.
 
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