Joined: July 2004
||Posted: 30 May 2019,10:03
You could be making problems for yourself by burying a RE. It's very bad practice, but not the sort of thing that would see you transported to Van Diemans' Land or swinging from a gibbet, but we like REs to be visible for avery good reasons.
In order of preference, I would suggest....
1 - find an alternative RE fitting that works for you
2 - use a small Recess Tray Cover in place of the RE and have the pipe access 'bunged' inside a shallow chamber beneath the RTC
3 - convert the RE to an Access Camber and use a RTC
Relying on a loose flag is all well and good for as long as you are around, owning the property, and in full retention of your marbles. The problem comes if you want to sell up, or if you leave this mortal coil. How can you ensure future owners, maintenance engineers, surveyiors and the like will be aware that the loose flag is actually a drain access point?
If you did put the property on the market at some point, and a keen-eyed surveyor spotted the missing RE, you could be required to reinstate it "properly", or to reduce your asking price to cover the cost of such works.
If you are intent on burying it, then you should use a disc cutter or similar to inscribe RE on the surface of the flag. This is what used to be done in the days before the modern Building Regs came into force and REs were required to be visible at the surface.
In such a case, I would coat the bed face of the candidate flag with a slury pimer based on SBR, klet it dry, then re-coat it, and let that dry. Same with the edges. Once all that slurry has properly cured (takes about 3 days) I'd then lay the candidate flag on a twenty-to-plenty mortar mix,....well, something like 12:1 OR 15:1 that will give adequate support but struggle to form a firm bond with the flag. Same for the jointing - either a weak mortar or some crap one-part polymeric (and there's no shortage of them on the market just now!)
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