Search found 13 matches

by oldie
Thu Apr 08, 2010 9:59 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: possible thermostat problem
Replies: 2
Views: 2664

Sounds a bit like a problem with the boiler stat, possibly exacerbated by poor circulation through the system. Hot water coming out of boiler should not exceed 80º. Many boilers are set to a max of about 70º, especially those heating a hot water cylinder, as this is more than sufficient to heat the ...
by oldie
Thu Apr 08, 2010 9:20 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Mixer tap on an unvented system
Replies: 1
Views: 2579

Do they have a poor water supply to the pressurised cylinder such that the fast filling of the bath is actually putting the pressurised cylinder under a slight vacuum - hence sucking followed followed by hammer on the mixer?
by oldie
Thu Aug 09, 2007 12:17 am
Forum: Plumbing Forum
Topic: Unvented hot water cylinder - confused!
Replies: 3
Views: 7476

Firstly, a family of 5 in a 4 bed house with both shower room and bathroom would probably want an indirect pressurised system with a capacity of between 200 and 250 litres. You would be struggling with only 125 litres. OSO 20 series systems are excellent and the better Megaflows are quite good. A vi...
by oldie
Thu Jul 26, 2007 12:04 pm
Forum: Electrics Forum
Topic: Stud and wire detector
Replies: 5
Views: 6159

Bosch do a very good one often seen in electrical wholesalers and tool merchants etc.

Also sold by Screwfix (Item 49160) for £69.99
by oldie
Wed Jul 18, 2007 1:02 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: 10mm pipe for cental heating how long can it be
Replies: 2
Views: 11142

Keston - very nice, sounds like it will be a good system. Presumably it will be an S plan configuration with the indirect cylinder in parallel with the central heating. Don't forget the bypass valve for when both 2 way valves are closed. Also if you're not using a pressurised heating loop, Keston of...
by oldie
Fri Jul 13, 2007 10:25 am
Forum: Electrics Forum
Topic: Lighting cables in the loft
Replies: 2
Views: 3891

The big problem with cables in lofts these days is the presence of vast amounts of insulation. All cables produce a small amount of heat (often not very much but can be up to 3watts/metre). Usually, if the cable is burried in a wall or clipped to a wall or joist etc, this is disipated quite easily. ...
by oldie
Thu Jul 12, 2007 10:53 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Speedfit Fittings
Replies: 2
Views: 3697

Advice correct.

Should follow it if possible.

If heating system is gravity fed from an open albeit covered expansion tank you might get away with it for a bit.

If it is pressurised, then get it sorted quickly before your luck runs out.
by oldie
Thu Jul 12, 2007 10:10 pm
Forum: Plumbing Forum
Topic: water main
Replies: 2
Views: 2978

All plastic pipe usually requires a pipe insert or stiffener. If ommitted, there is a good chance that under pressure the pipe might come out of the fitting which could be interesting ! I'm a bit confused about you pipe sizes. 22mm along with 15mm and 28mm are usually only used for internal plumbing...
by oldie
Sat Jul 07, 2007 11:58 pm
Forum: Plumbing Forum
Topic: High pressure tap on low pressure system
Replies: 2
Views: 9120

Yes - unless you drove it with something like a shower pump.
by oldie
Sat Jul 07, 2007 11:51 pm
Forum: Plumbing Forum
Topic: 15mm bath supply
Replies: 2
Views: 3224

A typical bath can be about a 100 litres. A typical header tank system with stored hot water and 22mm pipes to the bath can fill it at 20-30 litres a minute. i.e between 3 and 5 mins. With sufficient pressure a 15mm pipe could easily deliver 15-20 litres a minute but as your combi is probably only c...
by oldie
Sat Jul 07, 2007 11:29 pm
Forum: Plumbing Forum
Topic: new water main
Replies: 2
Views: 3259

Have you used the right insert for the pipe you are using ? Though nominally the same outside diameter, the wall thickness of plastic pipe can vary by a fraction of a millimetre from manufacturer to manufacturer. Hence the inside diameters can be up to half a millimeter different. Thus if you use an...
by oldie
Sun Jul 01, 2007 3:00 am
Forum: Plumbing Forum
Topic: megaflo buzzing noise
Replies: 1
Views: 11760

Presumably it's heating all night and buzzing due to the expansion of the water. If acceptable, modifying the timer so that the cylinder doesn't heat up during your sleeping hours might be a solution. If you are really desperate in the middle of the night - you might find that you can stop most of t...
by oldie
Sun Jul 01, 2007 1:36 am
Forum: Plumbing Forum
Topic: Low Water Pressure
Replies: 3
Views: 4781

Low Water Pressure

SYR PRV

Probably a type 312 from RWC - Reliance Water

Check out website at rwc.co.uk
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