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Discuss Megaflo pressure reducing valve in the Plumbing Jobs | The Job-board area at PlumbersForums.net

armyash

Plumbers Arms member
Plumber
Gas Engineer
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2,653
Hi everyone,

Was called to a megaflo last night, no water coming from any taps. Followed the recharge instructions but made no difference. I heard gurgling but no discharge appeared and the gurgling stopped after approx 3 minutes.

I spoke to heatrae sadia who recommended new pressure reducing/inlet valve.

Has anyone fitted a non heatrae sadia one before and is that OK?
Obviously heatrae sadia says it has to be their own but they would say that. Does it really make any difference if I was to order one that is a lot cheaper?

Thanks
 
Fine aslong as they don't care any more about the warranty
 
Personally I always replace like for like, dont buy the prv etc direct , there’s plenty places you can buy them . Just post a pic if you can I may have one .
 
What matters are the ratings to maintain safe operation. Many are no longer avail so how else can one proceed?
So long as all pressures, temps & discharge flow rates are replicated or exceeded then it's fine. Buying stuff from likes of altecnic (?) is perfectly acceptable - and cheaper.
Been replacing with alternatives for many years and never once any probs.
 
First, any 22MM PRV & full bore lever valve will fit. Youll just have to put a piece off 22mm tween em.

Of more concern to me is way pressure relief valve is piped. Its not in any way kosher. The tundish needs lowering ( i think but cant quite see) so the pressure relief discharges correctly.

Remember its your name, your insurance.
 
Hope you noticed the faults phone advanced water up they will have something for you in stock
 
Pathetic discharge pipe , but landlord wont be bothered .
They way thats done , I would put a good quality 3 bar prv , it’s obviously not a multi bloc so that helps you , the check valve is in the housing with the “running up hill “expansion valve lol . So the prv is on its own and easy to swap .
 
Almost certainly it will not be the PRV itself, have you checked the filter on the inlet to it to see if it is blocked ??
Are you a pro? because the additional cost to correct the faults would be small & how would the Landlord know what the whole job would cost?
 
If no water is coming out at all it will be the plastic white cap off the end of the PRV, it will be lodged it the check valve on the relief safety valve tee.
Turn off & take out the section of pipe between the two, bet you fit it wedged in there & blocking the flow.
 
Like for like replacements only for me, if there are not available then use approved replacements from approved suppliers £58 deliver if you have to buy a new PRV & isolation.
 
Each to their own Chris :)

BBA approval is only pertinent for initial sale.
So long as replacements do not materially alter performance it's insured.
 
Thanks.

I did notice the faults.

I was there to see why they had no hot water, I haven't met the landlord yet. Communication has been by text. I am sending them a price tonight and will also make them aware of any faults and price to repair.

Picture of Tundish below for those interested.

View attachment DSC_2613.JPG
 
Almost certainly it will not be the PRV itself, have you checked the filter on the inlet to it to see if it is blocked ??
Are you a pro? because the additional cost to correct the faults would be small & how would the Landlord know what the whole job would cost?

I will be offering to put right. Thanks
 
I will also be stating there may be additional faults that I'm not aware of yet.
 
I'm going to fit one of these with a lever valve, thats OK isn't it? Can redo the prv at the same time.

It means I can pick up tomorrow and get the water sorted before the weekend.
 
Should have attached this to my previous post.

ae235.jpeg
 
Yep
 
Thanks townfanjon, Im waiting on a reply from the landlord, I will update either way. Thanks
 
Ash , go to unventedcomponents.com .look at
PRED330001 , i think its the same prv.

As mentioned above , I would check for any blockages etc , check valve stuck etc etc before buying one, tell landlord there may have to be 2 visits , you arent a miracle worker
 
Ash , go to unventedcomponents.com .look at
PRED330001 , i think its the same prv.

As mentioned above , I would check for any blockages etc , check valve stuck etc etc before buying one, tell landlord there may have to be 2 visits , you arent a miracle worker

yea buts thats £75 you can get the above for around the 40 mark
 
Thanks for the advice townfanjon. I will use them in the future but if the landlord goes for it I will get the one I posted about just so I can get it sorted in time for the weekend.
 
Pretty sure megaflow ex valve is set to 8 bar the calefi one in the pic is 5 bar ( by memory) .
 
Ash if it is not too far away from you go back & remove the section of pipe you will find the small white cap blocking the pipe we have had a few of these. You do not need to replace the PRV but may be you can alter the pipework so it is how Part G & the MI's say it should be installed & not likely to be much difference in the cost (you shouldn't even need to drain the cylinder as the check valve will hold the water from coming back).
 
Ash if it is not too far away from you go back & remove the section of pipe you will find the small white cap blocking the pipe we have had a few of these. You do not need to replace the PRV but may be you can alter the pipework so it is how Part G & the MI's say it should be installed & not likely to be much difference in the cost (you shouldn't even need to drain the cylinder as the check valve will hold the water from coming back.

Thanks, I'll go armed with a new valve anyway. I'll check for blockages and if that's all it is I'll adjust the price accordingly. I would have done this when I first went but I haven't met the landlord and had no guarantee I'd be paid. I've sent a price and asked for 50% to be paid first.
 
Town. Fact is the filter on the pressure reducing valve will be solid with crap as its obvs never been touched so an all in one like that would simply save time and get it done first visit. What Ash then charges is up to him ;)

As I mentioned earlier, and completely agree with you, the PRV after MUST have the same value or less (but that can cause probs) NEVER ever higher.
 
Been tonight the filter was chocka with muck. It was solid I couldn't clean it up.

Put a new pressure reducing valve and lever valve on but the megaflo still won't fill. It will drain but won't fill. When I open the lever valve it will make a clunk as if its blocked but won't fill or let me recharge.
 
do you have water at the lever valve?
 
You can undo the black head from those PRVs to access the filter Ash.
What is the muck like? if it has come that far up the mains supply the likely hood is it is up against a stop valve or something else. Just got to work your way back along the line to see were you have water.
 

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