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How can I arrange a drain test to satisfy the Building Inspector when the only access chamber is in a section of pipe that doesn't lead anywhere (just to allow rodding through a stretch of pipe from the SVP junction and onwards under the boundary fence to cross my neighbours garden. He doesn't...

Very much less than 8cm.

I'm about to do the waste pipes in my new bathroom. The 40mm waste pipe passes out of an external wall to the main stack and there is a 2.5m run to the shower trap. I need to cut into that, mid-way, to connect a basin. I was looking at a Floplast Anti-Vac bottle trap - is that suitable for the...

I've used polypipe - would you test to a different pressure? Is something like this suitable: http://www.screwfix.com/p/prv-with-gauge-15-x-22mm/41943?

Does anyone have any suggestions for a method of testing for leaks in a new CH system before a boiler has been installed? (ie it's not a closed system and isn't connected to a water supply). I was going to connect up the as yet bare ends of the feed and return pipework to a couple of old...

I have some new radiators (they're Kudox) and some Honeywell TRVs, which come with a tail to screw into the radiator, and then the valve fastens to the tail with a nut and olive. I understand that the olive, not the thread, makes the waterproof join, and many people say don't bother to wrap...

[/url] Yes, it's quite clear that it's OK to operate the electrical element with the TVR (or ordinary valve) shut, whether or not the CH is running. The lockshield valve remains open (or, more likely after balancing, partly open) so the water can expand safely as it heats up. Good: I think...

I'm not completely sure, but I think the issue is that there is a cut-out device (not resettable) in the element that will 'blow' at the temperature a modern boiler will circulate water in a CH system. If your boiler runs at a lower temperature, there may be no problem at all, except that you...

I can't see a problem with shutting off the TVR, and using it as an electric-only rail for most of the year, but I'd be glad to hear of anyone's experience.

On mild Spring & Autumn days, the room thermostat will frequently shut off the CH system altogether for extended periods. There is no hot water being circulated by the pump, and the towel rail is stone cold. The instructions are very clear, that the electrical element should never be used when...

I've just fitted a dual-fuel towel rail and understand that I shouldn't switch on the electrical element when the CH is in use. However, I expect that in Spring & Autumn, when the heating is just ticking over, my rail not be hot long or often enough to dry towels properly, and wondered...

There will be an additional cost if the job overruns, but a big proportion of the cost is the use of a grab lift to take away the excavated material (3 x 14t loads), together with the hire cost of a concrete breaker, which we will probably only want for the first hour or so. The only reason we...

1000 pages to answer a couple of simple questions? And you have the nerve to call ME long-winded. Bugger off. You don't have to read anything that I write, and you certainly don't have to respond. Try the 'ignore' button.

Just out of interest, the designer's spec has the build up in the order: Stone Sand Blinding & DPM Insulation Concrete Screed I am going for concrete foundations 450mm below DPM, so should have plenty of wiggle-room.

I have received a quote of £2.8k to dig and concrete the footings (but that doesn't include the concrete or pump hire - another £1k) and do the underground drainage. That seemed on the high side, so I looked around, finding a local plant hire company, who also do groundworks and offer a grab...

I'm extending my average-sized semi at the rear and side, and need to almost completely renew the foul drainage. My existing glazed vitrified clay drain starts part-way across the back of my house, where there is a 1m deep brick built chamber, and then runs under the boundary fence onto my...

I can't see how that can work: when we pour the concrete it will cover the lintel and the space beneath it, and encase the pipe completely. Surely we need to shutter out or box out a space all around the pipe using a material that wont collapse under the weight of the poured concrete before it...

I have an existing soil pipe passing through the intended location of the foundation for my extension. We are going to use a trench-filled concrete foundation, and I am unsure of the usual method of providing the necessary protection and clearance for the pipe. I have seen diagrams showing...

So six courses of brick, not three? I can see the point about gullies, and wonder how the reduced cost of concrete (I'm quoted £78/cu mtr) compares with the additional labour and material of the brickwork. Does anyone have a guestimate of the cost of constructing such a foundation (excluding...

Why? It's what the designer has specified.