having a dispute with another installer

[Ricky]

Recently they flushed the system and installed the valve and filters. It is open vented cold feed and vent are in airing cupboard. No sign of safety valve on boiler, I was taught 40 years you never fitted

valves on the primary circuit for obvious reasons, do i tell homeowner?

 

[Deleted member 120897]

Sorry for seeming a thick here, and have I missed something? Why can’t valves be installed on primary circuits? Is it a gravity fed system? Solid fuel appliance.

 

[Ricky]

If the valves are shut and the boiler is fired up where does the expansion go? even if boiler runs for a short time.
I know it was worse when boilers didnt have overheat protection, just not sure how quickly the boiler will shut down, how big a pressure build up there will be in the boiler, i have never tried it to find out!

 

[ShaunCorbs]

Overheat / flow switch if your that bothered remove the handles

No one bats an eye with pump valves and a filter

 

[Christopher buzzard]

@Ricky was taught that also. A no no open vented systems.

 

[Ricky]

Overheat / flow switch if your that bothered remove the handles

Not all boilers have flow switches, Worcesters don't they rely on differential between flow and return, a valve is still a valve with or without handle

 

[ShaunCorbs]

Not all boilers have flow switches, Worcesters don't they rely on differential between flow and return, a valve is still a valve with or without handle

Overheat

So that means every heat only boiler with a filter and external pump is at fault / problem

Remove the handles then you require tools to turn off and you should know better

 

[Ricky]

Overheat

So that means every heat only boiler with a filter and external pump is at fault / problem

Remove the handles then you require tools to turn off and you should know better

no because the filter only blocks one of the pipes to the exspansion pipe the other is still left open, and I have seen some really stupid tenants!

 

[ShaunCorbs]

no because the filter only blocks one of the pipes to the exspansion pipe the other is still left open, and I have seen some really stupid tenants!

And the pump valves on the flow ? Eg with a heat only boiler

 

[Deleted member 120897]

If the valves are shut and the boiler is fired up where does the expansion go?

Feed/expansion pipe/tank? Having looked at the layout of these (not really looked since college days 17 years ago ), I’m possibly understanding the problem.