On Tue, 21 Apr 2020 09:42:46 +0100, Xeno wrote:

On 20/4/20 6:23 am, Jim GM4DHJ ... wrote:
On 19/04/2020 21:18, Commander Kinsey wrote:
On Sun, 19 Apr 2020 20:54:44 +0100, Jim GM4DHJ ...
wrote:

On 19/04/2020 20:31, Commander Kinsey wrote:
On Sun, 19 Apr 2020 20:29:37 +0100, Jim GM4DHJ ...
wrote:

On 19/04/2020 20:20, Commander Kinsey wrote:
On Sun, 19 Apr 2020 20:12:10 +0100, Jim GM4DHJ ...
wrote:

On 19/04/2020 19:28, Commander Kinsey wrote:
Why did drainpipes used to have a box on the wall, some sort of
overflow
if blocked? See link below for an example photo.
https://www.dropbox.com/s/1jry8zas14bmivc/box.jpg?dl=0
yip hopper heads were for that function and others....usually in the
days of three pipe systems foul waste and rainwater....then again
cast
iron rainwater downpipes weren't usually cocked if they were for
rainwater only and if the drain blocked the water ****ed out of the
first joint above ground......

What's the advantage of your waste spilling all over the garden
instead
of just not leaving the bath?
what ? ...

If the pipe is blocked and you empty your bath, then if you have a box,
the water goes everywhere outside. If you have no box, the bath just
stays full and you call a plumber. The second one is preferable
obviously.

In a one pipe combined drainage system where there is no storm water
sewer and if the drain blocks underground and it is raining the water
will back up and will come up the lowest appliance the bath if the
rainwater is into the top of the SVP ....you will have a flood in the
house big time... would like to see you bailing out the bath quicker
than the water backs up into it .......the best way is to take the

In this country (Aus) the sullage and the sewerage are kept separate.
The sullage lines go out into the street stormwater drains. They are
*not allowed* to be connected to the sewerage lines.

And somebody checks this regularly do they? Same "rule" applies in the UK, but I sometimes ignore it if the wrong pipe is closer to connect to.