Plumbing Connection 2-2015

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PLUMBING CONNECTION WINTER 2015 53
SMS Polypropylene maintenance shafts and chambers provide a low cost
and safe alternative to traditional concrete manholes in sewerage and drain-
age systems.
The SMS Range has been appraised as : WSAA Products Appraisal Report
13/17 Part 1. With product certification to WSA 137:2013—Industry Standard
for Maintenance Shafts and Maintenance Chambers for Sewerage.
The SMS 600mm AXEDO chamber complies with WSA137:2013.
The Polypropylene Maintenance Shafts have Water Mark accreditation
WMTS509-WM 040151 We are the only Maintenance
Shaft with Water Mark in Australia.
The range utilises RRJ sockets, with custom angled Shafts, assembled on
the day of order, with no fabrication required. SMS also stocks a full range of
Maintenance Shaft accessories incl. Access Covers, Caps, Bends etc.
The products are approved by Water Authorities throughout Australia.
SMS MAINTENANCE SHAFTS & MAINTENANCE CHAMBERS
CALL 1300 482 228 or Visit www.sewerms.com.au
SMS (Sewer Maintenance Shaft) Pty Ltd
ABN: 77 005 234 293
rimless toilets (DIN is the name of European Standards –
we call our local ones Australian Standards), though there
is consideration of changes in Germany. The test work for
this project was carried out in consideration of the nearest
Standard DIN EN 997, even though the rules around this
Standard were originally designed for toilets with a flushing
rim. Thus the Esslingen Flushing Test was created and this
extensive program featured 13 different test criteria.
As Central Europe is not so concerned about water
conservation as Australia or North America, the testing was
carried out using a 6 litre flush; however it is fair to expect
that even more issues could arise with this technology at
lower flush levels like 4.5/3 litre.
The flow rate from the cistern was a particular issue
that had to be considered and to achieve the DIN EN 997
requirement it was choked back on all models to the
allowable tolerances. This is where some of these product
tests get interesting.
Overspray is the result of so-called impact force which is
released during flushing and can ultimately end up on the
floor. Rimless toilets are sensitive to this flushing impact
force and as an installer you are unable to test it accurately
until the toilet is installed. Even then you will need an
adjustable cistern that you can throttle back, if need be, or
you will have some unhappy customers.
Washing down the pan is one thing; the DIN Standard also
factors in the volume of trailing water to flush the faeces.
According to the translation, around 1 litre is required for
the rinsing and the ~5 litre trailing balance of water is used
to remove the solids through the pelvic outlet (that’s what
the translation said) and into the drainage line and beyond.
As indicated earlier, this testing program used 6 litre toilets,
the Germans also manufacture 4.5/3 litre units, so the
flush and trailing balance of water would be less for those
products.
With the current drain-line carry issues in the
Australasian market; this is an issue of consideration,
particularly considering our flush levels are lower than those
used in Europe.
The Esslingen test program for each product covered
a number of interesting challenges: There’s the surface
flush with sawdust, rinse out of 50 plastic balls, toilet
paper flushing (naturally), the spulrandtest with blue food
colouring, the ausspultest with dumplings and paper. Oh,