Honeywell 2 port

[jaydebruyne]

Just curious,

I need to change a 2 port valve, there is an iso just above it but not below, if it's a sealed system can I not just shut off the iso and replace without draining, and if a vented system bung the feed and vent and replace without draining?

It's a 2 floor house and the valve is on the ground floor.

Cheers all

 

[gassafe]

If its sealed you could turn off the iso dump the pressure & snatch it with a towel underneath...

There's a risk of that iso leaking tho, even if you look at it 😱

 

[kris]

Can it be isolated at an external pump or boiler isolator ? normally if you find one iso then it can usually be totally isolated,,,
If its a sealed system then you have no vent pipe to bung , when you bung the cold feed n vent is an open vented system

 

[kris]

Is the system pressurised or open vented ? I take it the iso u found is on the other side of the zone valve to the boiler ?
If valve is on ground floor then trace it back to boiler theres bound to be sumit, just watch out for manual bypass valves lol

 

[jaydebruyne]

There's a manual bypass just above it with an iso valve. the boiler and pump are before the iso valves to the 2 ports.. I'll have to have a proper look but I think I may just drain down. Chicken I know but would rather keep my job then try and be quick

 

[jaydebruyne]

Is the system pressurised or open vented ? I take it the iso u found is on the other side of the zone valve to the boiler ?
If valve is on ground floor then trace it back to boiler theres bound to be sumit, just watch out for manual bypass valves lol

I think it's vented but I didn't really take a proper look as was just there to confirm if the valve was faulty or not. The iso is on the same side to the boiler ... Strangely enough

 

[gassafe]

Just change the head & no worries 😉

 

[jaydebruyne]

Just change the head & no worries 😉

Heads been changed and the valve has since seized. It was freed but have recommended to get it changed

 

[missplumb]

you could freeze the side without the iso, either spray or a electric freeze kit, that would be better as you could freeze both sides of the valve at the same time

 

[IDCHAPPY]

When in doubt, drain it out.

 

[jaydebruyne]

you could freeze the side without the iso, either spray or a electric freeze kit, that would be better as you could freeze both sides of the valve at the same time

I wouldn't trust freezing as space is limited (behind a kitchen cupboard under the sink near the floor).. so with pulling and banging pipes apart I wouldn't trust the ice plug.. my freeze kit isn't electric, just the arctic pro kit

 

[jaydebruyne]

When in doubt, drain it out.

I hear you LOUD and clear my friend!!!

 

[Best]

Try isolating anything you can & bung the feed & vent if it is open vented and crack a nut open on the mv with a tray below it. Can't go wrong, - if the water doesn't nearly stop eventually, just drain then if you are scared.

 

[jaydebruyne]

Try isolating anything you can & bung the feed & vent if it is open vented and crack a nut open on the mv with a tray below it. Can't go wrong, - if the water doesn't nearly stop eventually, just drain then if you are scared.

mv? Sorry it's late and I've had wine

 

[Best]

mv? Sorry it's late and I've had wine

Just my abbreviation for motorised valve.

 

[jaydebruyne]

Just my abbreviation for motorised valve.

Oh ok cool... Cheers, Best