no water at hot taps

[R.Oak]

Hey guys, im struggling to work out an issue a customer is reporting on her hot water system.

It is gravity fed HWS.

She has rung me a couple of times to say there is no water coming out of her hot taps. Each time she rings me before i get there to say its working again. Today I went down take a look anyway. The roof tank is filling fine, from what she said I dont think there is enough demand from the familys use to drain it fully.

I guess it is airlocking and then clearing before i get there every time. There has been no plumbing work done recently, the system has worked fine for years so i am scratching my head as to what may be causing it.

could do with some advice for next time it happens. Thanks in advance for any suggestions. Rich

 

[stevetheplumber]

strip and clean the ballvalve even a little bit of dirt in the orifice makes a big difference to the fill rate if that doesnt work some times another ball valve or a 3/4 one will be enough to keep up

 

[tamz]

What capacity tank?
What pressure like (mains)
What size ballcock.
Check pipe runs in attics for dips from someone walking over them.

 

[R.Oak]

no sure on ltrs but its a big one, like the size of a bath. Mains pressure feeding the tank is good, and it appears to be filling fine. the outlet from the tank is 22mm copper and looks fine.

On inspection it all looks good up there, but i cant think of any other reason why the system would airlock of its own accord?

 

[bright spark]

Do they have a pumped shower in bathroom r ensuite. 1 of them can empty a tank fast especially if they have any teens that like enjoying their 15 min showers. If they do run it for say 5 mins to see what effect it has on water level in tank

 

[R.Oak]

Do they have a pumped shower in bathroom r ensuite. 1 of them can empty a tank fast especially if they have any teens that like enjoying their 15 min showers. If they do run it for say 5 mins to see what effect it has on water level in tank

Yes, they have a shower pump and two teenage girls who are apparently always in the shower. Thanks man i shall take a look

 

[Ermintrude]

Yes, they have a shower pump and two teenage girls who are apparently always in the shower. Thanks man i shall take a look

What at the girls in shower?

 

[bright spark]

Your a dirt bird!!! Thought had crossed my mind

 

[R.Oak]

What at the girls in shower?

Wouldnt mind a peep at the eldest tbh!

 

[Dotty]

Thank gawd this is in the Arms! You all had me worried then.

Anyway....

 

[lame plumber]

Thank gawd this is in the Arms! You all had me worried then.

Anyway....

just for you John

 

[rpm]

View attachment 20178

just for you John

You`ve been saving that up waiting for the right moment haven`t you LP lol

 

[kris]

Thats just wrong

 

[Dotty]

View attachment 20178

just for you John

You and your selfies.....

 

[bright spark]

Ah lads that's just wrong. I'm damaged after seeing that picture. Nightmares tonight