Plumbing Connection Winter 2016

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PLUMBING CONNECTION WINTER 2016 65
therefore some regulate inlet flow
by the inherent hydraulic design of
the pan. While this may aid in the
toilet pan flushing performance it
can sometimes create a situation
where the cistern is unable to function
correctly.
Cistern performance can also be
affected by the toilet pan it has been
matched with, where the hydraulic
back pressure from the inlet of the
toilet pan is able to vary the discharge
volume. The discharge or outlet valve
of the cistern is designed to operate
under a particular set of conditions to
ensure that it consistently delivers the
correct amount of water during a flush.
Leading manufacturers have
teams of design engineers tasked
with ensuring a device can be made
as flexible as possible, allowing the
cistern to be matched with a vast
range of toilet pans in various set
up situations. There are instances
however, where the hydraulic design of
pans can alter the internal behaviour
of the flushing device (including
electronic valves) where incorrect or
inconsistent volumes are discharged.
PROVE has seen instances where
flushing devices can deliver too much,
or too little water when coupled with a
pan outside of the device’s operating
capability.
If a toilet does not appear to be
flushing correctly, there is a possibility
that the combination of flushing device
and toilet pan has not been correctly
matched. Under WELS legislation,
plumbing merchants are required
to ensure products sold are fit for
purpose and meet all performance
requirements and water efficiency
standards. This means that purchasing
a pan/cistern combination together at
a single retailer should be a safe bet,
as opposed to procuring the items
separately. When in doubt, it is best
to request confirmation from the
merchant and/or manufacturer as to
whether a particular combination is
a suitable match and performance
has been verified. Matching a pan and
flushing device without validating its
suitability is similar to blind dating; in
that the combination may function, but
there is no level of confidence that the
relationship between the two was ever
going to work harmoniously.
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
Contact:
For information on how toilets are
tested to Australian Standards,
please contact PROVE Standards &
Engineering.