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by plumbbob
Mon Apr 21, 2014 8:19 am
Forum: Bathrooms, Drainage and Waste Plumbing Forum
Topic: Fitting Low level shower tray on top of new flooring or before?
Replies: 1
Views: 3159

Re: Fitting Low level shower tray on top of new flooring or before?

The tray should not sit directly on the chipboard floor, but should be supported over it's entire area by at least 18mm of marine grade plywood. So, this means, chipboard floor, plywood, and finally, tray bedded in to a layer of cement. What I would normally do is cut the ply slightly smaller than t...
by plumbbob
Mon Apr 21, 2014 8:03 am
Forum: Bathrooms, Drainage and Waste Plumbing Forum
Topic: How to secure bath to wall and support it?
Replies: 4
Views: 17022

Re: How to secure bath to wall and support it?

The wood is not only there to strengthen the lip of the bath but also to hold the front and end panels in place after they are fitted. The battens should be stuck firmly in place during manufacture and should certainly not drop off when removing the packaging. However, I have come across this proble...
by plumbbob
Wed Apr 02, 2014 5:42 pm
Forum: Bathrooms, Drainage and Waste Plumbing Forum
Topic: Replace Shower Door With New Heavier Door - Will Stud Work be ok?
Replies: 2
Views: 2593

Re: Replace Shower Door With New Heavier Door - Will Stud Work be ok?

Nope. The stud wall will be fine. In fact, the screen will make the wall sturdier because the weight is on the tray not the wall.

I fit 10mm screens to thin airing cupboard walls regularly.
by plumbbob
Thu Jan 09, 2014 8:18 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Vailant Boiler Issue - System Dropping Pressure and Ejecting Water When Hot
Replies: 3
Views: 3576

Re: Vailant Boiler Issue - System Dropping Pressure and Ejecting Water When Hot

From the symptoms you descibe, I would not consider the prv as a prime suspect. Generally, prv's fail by constantly dribbling redardless of whether the boiler is on or not. The Vaiilant pressure should kept at around 1to 1.5 bar. Anything greater is not necessary and simply puts a greater strain on ...
by plumbbob
Sun Dec 15, 2013 5:42 pm
Forum: Electrics Forum
Topic: Motion Sensor for Electric Shower - What Relay?
Replies: 16
Views: 6652

Re: Motion Sensor for Electric Shower - What Relay?

But if a contactor is noisy, then I won't use it. For sure, a 40amp contactor will make a loud “thud” when it pulls in! However the question has to be why have an isolator? Although we will normally fit isolators on shower and cooker supplies there is nothing as far as I can see which says you have...
by plumbbob
Fri Dec 13, 2013 6:44 pm
Forum: Electrics Forum
Topic: Motion Sensor for Electric Shower - What Relay?
Replies: 16
Views: 6652

Re: Motion Sensor for Electric Shower - What Relay?

I just hope this installation gets to be correctly inspected and tested for safety. I don't see how it can be if any isolaters are put in the loft. IEE regulation states they must be placed in a visible location adjacent to the equipment they protect. The other stipulation for a shower isolater is ...
by plumbbob
Mon Dec 09, 2013 5:44 pm
Forum: Bathrooms, Drainage and Waste Plumbing Forum
Topic: Salamander CT55 Connection Pump Installed to Boost Supply to Kitchen But Poor Supply to New En-Suite - How to Improve This?
Replies: 4
Views: 4376

Re: Salamander CT55 Connection Pump Installed to Boost Supply to Kitchen But Poor Supply to New En-Suite - How to Improve This?

You've basically got it. Rather than a simple flow switch, a negative head pump uses a combination of a non-return valve, pressure switch and a small expansion vessel to maintain a static pressure in the pipework. When an outlet is opened, the resulting drop in pressure triggers the pump.
by plumbbob
Sat Dec 07, 2013 10:44 am
Forum: Bathrooms, Drainage and Waste Plumbing Forum
Topic: Salamander CT55 Connection Pump Installed to Boost Supply to Kitchen But Poor Supply to New En-Suite - How to Improve This?
Replies: 4
Views: 4376

Re: Salamander CT55 Connection Pump Installed to Boost Supply to Kitchen But Poor Supply to New En-Suite - How to Improve This?

Yes. Converting to a negative head system would solve the problem.
by plumbbob
Mon Dec 02, 2013 10:54 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Vaillant 110 Timer Unit Not Turning Boiler Off at Set Times
Replies: 2
Views: 8750

Re: Vaillant 110 Timer Unit Not Turning Boiler Off at Set Times

You should be aware, the timer does not directly control the boiler so it is perfectly possible for it to fire even if it is the off position. What should happen of course, is the radiators shouldn't get hot unless the frost stat is kicking in or the boiler is exercising itself. The 110 timer is a b...
by plumbbob
Thu Nov 28, 2013 10:31 pm
Forum: Plumbing Forum
Topic: Kitchen Tap Connector - Need Help Identifying Type of Connector and Removing it
Replies: 4
Views: 4507

Re: Kitchen Tap Connector - Need Help Identifying Type of Connector and Removing it

What you do need to be careful of is the inserts that are in the pipe. All plastic pipe must have inserts fitted to strengthen the pipe. Whilst you can use any fitting with the pipe, these inserts match the pipe and vary in size between manufacturers. Try and remove the inserts from the pipe you cut...
by plumbbob
Wed Nov 27, 2013 11:37 pm
Forum: Plumbing Forum
Topic: Mira Shower in a New Build House Filters Keep Clogging up - Plumbers Advice Sought
Replies: 25
Views: 15746

Re: Mira Shower in a New Build House Filters Keep Clogging up - Plumbers Advice Sought

Have you had the tap sorted yet??

What's the betting one of the flexible hoses is blocked with the same gunk?? The bore of these pipes is often only 5mm or so.
by plumbbob
Wed Nov 27, 2013 11:33 pm
Forum: Plumbing Forum
Topic: Kitchen Tap Connector - Need Help Identifying Type of Connector and Removing it
Replies: 4
Views: 4507

Re: Kitchen Tap Connector - Need Help Identifying Type of Connector and Removing it

They are certainly not a popular make. I've only seen them once before, Manufactured by Marley and supplied by Plumb Center I believe.

The bad news is, they are tamper proof so are not demountable.

Cut them off.
by plumbbob
Sun Nov 10, 2013 7:45 pm
Forum: Plumbing Forum
Topic: No water coming from any hot water tap
Replies: 1
Views: 2564

Re: No water coming from any hot water tap

No airlock will stop hot water from a combi boiler. IF the cold is working then the hot should be too.

My guess is you have turned a valve off to connect the dishwasher and forgotten to turn it on again.

Where is the boiler? Did you make any changes to the pipework when fitting the dishwasher?
by plumbbob
Thu Oct 31, 2013 9:04 pm
Forum: Plumbing Forum
Topic: New Kitchen Mixer Tap Problem Using Flexi Hose Connector
Replies: 6
Views: 8876

Re: New Kitchen Mixer Tap Problem Using Flexi Hose Connector

I've seen this problem before when fitting a kitchen. In fact, I've seen it several times. The first time, it took me until nearly 8pm one day at a customer's house trying to figure out what was happening. Esentially, you have a faulty tap. There is a fault in the casting that is allowing the water ...
by plumbbob
Tue Oct 15, 2013 11:13 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Strange Pressure Issue With Heating System - Camray Oil Fired Combi Boiler
Replies: 8
Views: 8634

Re: Strange Pressure Issue With Heating System - Camray Oil Fired Combi Boiler

Sorry, you have confused me. The pressure was 3.5 psi and you lowered it to 20psi??? The maximum pressure should be 22 psi (I think) but would normally be between .5 and 1.5 bar (7 -22 psi) "The Expansion Vessel is suitable for systems with a static head of up to 5 metres (16.5ft) i.e. the vert...
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