DIY Forum

 

Ultimate HandymanUltimate Handyman on Pinterest

 

DIY Forum/Home improvement advice forum

 

 

A-Z CONTENTS | DISCLAIMER | DIY VIDEO | HOME | SAFETY FIRST | FORUM RULES

It is currently Sat Apr 20, 2019 7:49 am


Time zone: Europe/London [ DST ]




 

 


Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: Boiler losing pressure
PostPosted: Mon Feb 25, 2019 5:15 pm 
Offline
Newly registered Member

Joined: Wed Aug 10, 2016 10:33 pm
Posts: 5
Has thanked: 0 times
Been thanked: 0 times
HI All.

My boiler is losing pressure and need topping up every day.

There is a pool of water outside. I tried repressurising the expansion vessel. Pressure dropped to zero when I let the air out (no water from valve), then back up to 1.5 bar when inflated to .8bar. When the heating ran, the system pressure went up to just under 3 bar.
Next morning, it had dumped again.

Do you think that this is an expansion vessel issue, or a dodgy PRV?


Share on FacebookShare on TwitterShare on DiggShare on Delicious
Top
 Profile  
Reply with quote  
PostPosted: Mon Feb 25, 2019 5:19 pm 
Offline
Senior Member
User avatar

Joined: Sat Jan 10, 2009 3:49 pm
Posts: 24385
Location: hants/dorset border
Has thanked: 1550 times
Been thanked: 3892 times
Sounds like the PRV to me, but I'm no heating engineer.

I'll see if I can get this moved to central heating.

_________________
Verwood Handyman

Verwood Handyman


___________________________________________________________________

If you feel you have benefited from the Free advice given on the Forum, Please consider making a donation to UHM's Nominated charity, read all about it and donate here :

http://www.donnasdreamhouse.co.uk/


Top
 Profile  
Reply with quote  
PostPosted: Mon Feb 25, 2019 5:27 pm 
Offline
Newly registered Member

Joined: Wed Aug 10, 2016 10:33 pm
Posts: 5
Has thanked: 0 times
Been thanked: 0 times
thank you


Top
 Profile  
Reply with quote  
PostPosted: Mon Feb 25, 2019 5:57 pm 
Offline
Senior Member

Joined: Sat Sep 01, 2012 7:03 pm
Posts: 8592
Has thanked: 41 times
Been thanked: 1469 times
I am NOT a heating engineer but if there is water outside then the PRV has operated. Question is, why.

Perhaps you could refill and watch it all day to see when it dumps.
May be a week end?

_________________
Fret not, a forum is a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

If gloom had a voice, it would be me. :mrgreen:

:idea1: How to post a picture on this forum Click here


Top
 Profile  
Reply with quote  
PostPosted: Mon Feb 25, 2019 6:13 pm 
Offline
Senior Member

Joined: Sat Apr 19, 2014 6:27 pm
Posts: 808
Has thanked: 81 times
Been thanked: 192 times
I am NOT a heating engineer....

More often than not, once a PRV has been operated, for whatever reason, it will continue to let by, once some dirty water has passed through it.

So it's within the realms of possibility that recharging the expansion vessel has fixed the original cause but the PRV is now mullered.


Top
 Profile  
Reply with quote  
PostPosted: Mon Feb 25, 2019 10:40 pm 
Offline
Senior Member

Joined: Sat Aug 11, 2018 6:44 pm
Posts: 115
Has thanked: 31 times
Been thanked: 19 times
Replacing the valve on the expansion vessel solved this for me in the past. Cheaper and easier to replace that first before the PRV.

Sent from my Nexus 5X using Tapatalk


Top
 Profile  
Reply with quote  
PostPosted: Tue Feb 26, 2019 12:05 am 
Offline
Senior Member
User avatar

Joined: Wed Nov 14, 2007 10:21 pm
Posts: 7495
Location: Northampton
Has thanked: 327 times
Been thanked: 972 times
If it's going up top 3 bar you have an issue with the expansion vessel or the hose that joins it to the boiler. The PRV may be faulty but that would be a symptom not the cause

_________________
As always help on here is free, however if you think you have saved a decent sum of money why not click the link to find out about the charity we're currently supporting? A couple of quid makes a real difference.

donnas-dream-house-charity-t52110.html


Top
 Profile  
Reply with quote  
PostPosted: Tue Feb 26, 2019 4:35 pm 
Offline
Newly registered Member

Joined: Wed Aug 10, 2016 10:33 pm
Posts: 5
Has thanked: 0 times
Been thanked: 0 times
thanks all.

I've gone belt and braces and ordered new expansion vessel and PRV. £42 delivered. not as bad as I thought it would be.


Top
 Profile  
Reply with quote  
PostPosted: Mon Mar 11, 2019 10:13 am 
Offline
Senior Member

Joined: Sat Aug 11, 2018 6:44 pm
Posts: 115
Has thanked: 31 times
Been thanked: 19 times
Was the problem fixed with the new expansion vessel?

Sent from my Nexus 5X using Tapatalk


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

 

 




Similar topics
   

Time zone: Europe/London [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Visit Solent plastics


 

 

 

News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list
ultimatehandyman privacy policy

Contact

 

Powered by phpBB® Forum Software © phpBB Group

phpBB SEO