Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas
pipe?

There is no provision for locking the supply shut off valve in the
outdoor meter cabinet. The 15mm is T'd off from the boiler feed and runs
across ceiling joists which are coming out.

Also Megaflow experience.. There is ample mains pressure here 4-6 bar so
the system can run at the designed pressure. I am considering pipe
routing (to minimise hot water arrival times) and wonder if 15mm gives
adequate bath fill flow rates.

Also any thoughts about plastic piping for plumbing other than
underfloor heating? Noise, reliability for hot supply etc.
--
Tim Lamb

On 27/08/2016 09:12, Tim Lamb wrote:
Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas pipe?

It's a hanging offence not to cap a supply!

Compressions can be used in pipework as long they're accessible.

There is no provision for locking the supply shut off valve in the
outdoor meter cabinet. The 15mm is T'd off from the boiler feed and runs
across ceiling joists which are coming out.

Also Megaflow experience.. There is ample mains pressure here 4-6 bar so
the system can run at the designed pressure. I am considering pipe
routing (to minimise hot water arrival times) and wonder if 15mm gives
adequate bath fill flow rates.

Mains pressure - yes.

Also any thoughts about plastic piping for plumbing other than
underfloor heating? Noise, reliability for hot supply etc.

I avoid the stuff, but is quick to put in place. Others here might have
more experience than me.

On Sat, 27 Aug 2016 09:32:16 +0100, Fredxxx wrote:



Also any thoughts about plastic piping for plumbing other than
underfloor heating? Noise, reliability for hot supply etc.

I avoid the stuff, but is quick to put in place. Others here might have
more experience than me.

At a B&B where I knew the owners I commented that drainage from the
handbasin was slow. Then I realised that the culprit was inadequately
supported plastic pipe that distorted when hot water ran through it.
(They didn't put me in that room the next time I stayed there.)

On 27/08/2016 09:12, Tim Lamb wrote:
Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas pipe?

No. Compression and capillary solder fittings are acceptable on gas.

There is no provision for locking the supply shut off valve in the
outdoor meter cabinet. The 15mm is T'd off from the boiler feed and runs
across ceiling joists which are coming out.

Also Megaflow experience.. There is ample mains pressure here 4-6 bar so
the system can run at the designed pressure. I am considering pipe
routing (to minimise hot water arrival times) and wonder if 15mm gives
adequate bath fill flow rates.

At those pressures (although note that an unvented system will normally
have a PRV bringing the operational down to around 3 bar) you should
still get fast fill times. What you may find is you get a bit more
noise, and a more notable drop off in performance when other users in
the property are drawing water.

See http://wiki.diyfaq.org.uk/index.php/Unvented_DHW

Also any thoughts about plastic piping for plumbing other than
underfloor heating? Noise, reliability for hot supply etc.

If assembled with care, then performance and reliability seems ok. For
some applications its a massive time saver on installation. Main
downsides are it looks clunky and the fittings are pricey (but offset by
lower pipe prices). Also has the advantage of being easier to dismantle
if needs be.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

John Rumm wrote:
On 27/08/2016 09:12, Tim Lamb wrote:
Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas pipe?

No. Compression and capillary solder fittings are acceptable on gas.

With the proviso that compression fittings must remain accessible surely?

Tim

--
Trolls AND TROLL FEEDERS all go in my kill file

In message , Tim+
writes
John Rumm wrote:
On 27/08/2016 09:12, Tim Lamb wrote:
Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas pipe?

No. Compression and capillary solder fittings are acceptable on gas.

With the proviso that compression fittings must remain accessible surely?

This will be in plain sight under the boiler. Eventually the boiler will
be replaced/repositioned by a professional:-)

--
Tim Lamb

On 27/08/16 09:12, Tim Lamb wrote:
Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas pipe?

There is no provision for locking the supply shut off valve in the
outdoor meter cabinet. The 15mm is T'd off from the boiler feed and runs
across ceiling joists which are coming out.


I *believe* that's fine as long as it is accessible and not under
flooring or in loft spaces - ie it's out in the open, inside a room or
outside the house.

Otherwise it should be done with a solder cap.

I put a 22mm compression stop on mine just outside of the meter box, all
outside.

On 27/08/16 12:18, Tim+ wrote:
John Rumm wrote:
On 27/08/2016 09:12, Tim Lamb wrote:
Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas pipe?

No. Compression and capillary solder fittings are acceptable on gas.

With the proviso that compression fittings must remain accessible surely?

Tim


And accessible pretty much means "on show" with gas, not "well, maybe,
if I prise a floorboard up under this fitted carpet" like electrics.

In message , John
Rumm writes
On 27/08/2016 09:12, Tim Lamb wrote:
Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas pipe?

No. Compression and capillary solder fittings are acceptable on gas.

OK.

There is no provision for locking the supply shut off valve in the
outdoor meter cabinet. The 15mm is T'd off from the boiler feed and runs
across ceiling joists which are coming out.

Also Megaflow experience.. There is ample mains pressure here 4-6 bar so
the system can run at the designed pressure. I am considering pipe
routing (to minimise hot water arrival times) and wonder if 15mm gives
adequate bath fill flow rates.

At those pressures (although note that an unvented system will normally
have a PRV bringing the operational down to around 3 bar) you should
still get fast fill times. What you may find is you get a bit more
noise, and a more notable drop off in performance when other users in
the property are drawing water.

See http://wiki.diyfaq.org.uk/index.php/Unvented_DHW

Yes. There are a few potential *gotchas* in there.

Annual maintenance. Any legal implications or professionals involved?

Careful pipe routing should minimise drawoff pressure variations ie.
separate feeds to kitchen/bathrooms/basins.

The house is chalet /bungalow so header tanks not really practical.

20l/min could be tricky but I might be able to enlarge the main supply
pipe as part of another project.

Also any thoughts about plastic piping for plumbing other than
underfloor heating? Noise, reliability for hot supply etc.

If assembled with care, then performance and reliability seems ok. For
some applications its a massive time saver on installation. Main
downsides are it looks clunky and the fittings are pricey (but offset
by lower pipe prices). Also has the advantage of being easier to
dismantle if needs be.

I am planning boxed in ducting for the main runs. To facilitate first
floor underfloor heating I am going to cross batten the joists.
Cold/drinking water runs may need ca-)


--
Tim Lamb

On 27/08/2016 12:18, Tim+ wrote:
John Rumm wrote:
On 27/08/2016 09:12, Tim Lamb wrote:
Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas pipe?

No. Compression and capillary solder fittings are acceptable on gas.

With the proviso that compression fittings must remain accessible surely?

Yes generally (although definitions of what is "accessible" can be open
to interpretation)


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 27/08/2016 12:52, Tim Lamb wrote:
In message , John
Rumm writes
On 27/08/2016 09:12, Tim Lamb wrote:
Now stripping out plumbing and electrics.

Is it a hanging offence to use a 15mm compression stop end on a gas
pipe?

No. Compression and capillary solder fittings are acceptable on gas.

OK.

There is no provision for locking the supply shut off valve in the
outdoor meter cabinet. The 15mm is T'd off from the boiler feed and runs
across ceiling joists which are coming out.

Also Megaflow experience.. There is ample mains pressure here 4-6 bar so
the system can run at the designed pressure. I am considering pipe
routing (to minimise hot water arrival times) and wonder if 15mm gives
adequate bath fill flow rates.

At those pressures (although note that an unvented system will
normally have a PRV bringing the operational down to around 3 bar) you
should still get fast fill times. What you may find is you get a bit
more noise, and a more notable drop off in performance when other
users in the property are drawing water.

See http://wiki.diyfaq.org.uk/index.php/Unvented_DHW

Yes. There are a few potential *gotchas* in there.

Annual maintenance. Any legal implications or professionals involved?

Its worth maintaining obviously (and the required work is not onerous).

If using a pro, one should check he has the qualifications in unvented
cylinders.

Hot water storage cylinders come under building regs (unvented always
did, and vented was added more recently), and so fitting one is a
notifiable job etc - as to how often that is actually done in practice I
don't know, but would guess its up there with the number of standalone
part P applications ;-)

Careful pipe routing should minimise drawoff pressure variations ie.
separate feeds to kitchen/bathrooms/basins.

Yup that can help - as would having roughly equal flow resistance on the
separate runs.

The house is chalet /bungalow so header tanks not really practical.

Yup, had the same problem here - bungalow converted to chalet style, but
with a traditional vented system originally. The result was woeful hot
water performance on the first floor (i.e. if you lifted the shower
handset on the bath taps more than a couple of feet about the bath, the
flow stopped!)

20l/min could be tricky but I might be able to enlarge the main supply
pipe as part of another project.

Yup well worth doing if going this route - flow rate will make or break
the experience.

Also any thoughts about plastic piping for plumbing other than
underfloor heating? Noise, reliability for hot supply etc.

If assembled with care, then performance and reliability seems ok. For
some applications its a massive time saver on installation. Main
downsides are it looks clunky and the fittings are pricey (but offset
by lower pipe prices). Also has the advantage of being easier to
dismantle if needs be.

I am planning boxed in ducting for the main runs. To facilitate first
floor underfloor heating I am going to cross batten the joists.
Cold/drinking water runs may need ca-)

;-)


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/