Drain cock dilema

[frank999]

Draining down a combi heating system.

I can only find drain cocks that you connect a hose to, I am aware there are some with a Hozelock fitting.
Either way - you need to have a hose pipe trailing across floors (and in this instance - down stairs) to a drain.

Would it not be better to install a gate or ball valve - and fit a run of copper pipe to a drain.

Only downside is if someone were to poke around, turn say a ball valve and accidentally drain the heating system.

What is the diference between a Type A and Type B cock.

Thanks

 

[denso13]

Type A has a gland on the spindle so doesn't leak like type B

 

[Gasguru]

And how many customers do you think would pay for that?
And what do you do when you've got several drops to rads?

Type A have an o ring around the spindle and often an o ring behind the knurled ring (if not use PTFE). When you drain down the water doesn't p1ss around the threads and soak the floor.
Type B are cheap and nasty with no seals.

 

[frank999]

And how many customers do you think would pay for that? point taken, guess it depends where the pipe has to run to.

Type B are cheap and nasty with no seals. Thanks for the tip

 

[endecotp]

Would it not be better to install a gate or ball valve - and fit a run of copper pipe to a drain.

I have one of those; it’s a valve between the lowest point in the CH circuit and a bath overflow pipe, so you can drain the CH and it comes out just above ground level next to a path.

BUT - I had lived here for five years before I discovered it. I had even fitted my own drain valve (with hose connection) by that point. I was getting a new carpet in the spare bedroom and decided to investigate a squeaky floorboard first. I lifted the carpet and underlay and there was a large black X painted on the floor where the squeak came from. I undid a few screws and there it was.