Pipe insulation & different types

[Mjward]

That's a really horrible way to do a drain off with press fittings!

Oh dear... What's wrong with them, do I need to complain?

 

[exedon2]

Wrong drain off should be long stem type then you would not have that scruffy bit of soldering.
Holds water but any decent engineer looking at it will always think what?8

 

[Mjward]

Understood. In the future if I need to drain system, how can I tell which of those two valves to use?

 

[Ric2013]

They look like flow and return pipes. You may need to use both as the water in the top pipe will probably have no way to get into the lower pipe in a draindown situation (this is normal and is probably why 2 valves have been fitted.).

 

[Mjward]

They look like flow and return pipes. You may need to use both as the water in the top pipe will probably have no way to get into the lower pipe in a draindown situation (this is normal and is probably why 2 valves have been fitted.).

Ah very good to know. Thanks for your help