27-05-19 UNI-SAN Domestic Instructions Page 6
Emery paper strip
50 mm O.D. hole saw (for cutting out UNI-SAN Bottom Inlet Valve hole)
42 mm O.D. hole saw (for cutting out tank vent pipe hole)
Other sizes as required, holes cut must be no more than 3 mm larger than the OD of the valve socket thread.
8. GENERAL INSTALLATION ASPECTS AND ELECTRICAL DATA
8.1 General
1. Where a permit or consent is required, it is recommended that the unit should be installed by a registered plumber
and the power supply should be connected by a registered electrician. It is the responsibility of the installer to
obtain the necessary permits and ensure full compliance with all applicable local regulations. The owner or owner's
agent must ensure that the UNI-SAN is compatible with the existing or proposed plumbing system design.
2. The installation of the unit and the swing check valve must comply with the following conditions
- they are easily accessible for servicing;
- service fixtures and appliances located on the same floor level as the unit, each must have a waste trap installed;
for below-floor installations refer to Appendix C.
- are in a clean, dry, non-floodable position, protected from UV and on a permanently sturdy support;
- design against overflow, flooding, unwarranted interferences or excessive moisture;
- protect from freezing of liquids in the unit and the pipework;
- the tank is installed with the screwed inspection lid on top;
- unless the unit is installed below the floor level as in Appendix C,
Figure 7c
, install an individual UNI-SAN Bottom
Inlet Valve for the shower tray and one for the bath;
- if installed outside or below the floor, the unit is installed according to Appendix C.
- all the requirements in these instructions are met.
3. Cut holes carefully. Check via the inspection lid, the position of fittings inside the tank before drilling. For PVC
valve sockets, allow room for the back-nut. Take care not to score or mark the tank as this may weaken it.
4. Modifications not described in this manual and without written authorisation by a Wallace representative will nullify
the Wallace Pumps warranty and durability compliance.
8.2 Plumbing
1.The connection to the soil and waste drain system must be carried out in accordance with the Building and
Plumbing Code. The connection of the unit's delivery pipe to a soil or waste pipe should be kept at least 0.5 metre
distance from any other connection. Also it must not be connected in a section of the pipe which runs the risk of
being flooded creating a back pressure down the pipework to the unit. The connection point is usually 600 mm
above the lowest W.C. connection or the lowest gully trap. Delivery into a gully trap must have an elbow to direct
the flow downwards. The connection of the delivery from the unit to a soil or waste pipe should be a swept
inspection bend in the direction of flow of the soil or waste pipe.
2. Any horizontal section of the delivery pipework should always have a continuous rise towards the soil or waste
pipe connection. It should never be level or have a fall. The pipework must be securely strapped and isolated from
the building structure to prevent vibration and noise transmission.
3. Install only the supplied swing check valve within one metre of the pump in a vertical position.
WARNING : Use of non-approved non-return valve will invalidate the WALLACE UNI-SAN warranty. The valve
must be installed in an easily accessible position for future servicing.
4. All pumped appliances, such as washing machines and dishwashers, must discharge via an approved waste
system which includes an air gap and a trap. BEWARE OF OVER TEMPERATURE DISHCARGE FORM
WASHING MACHINES.
5. Ensure that the 32 mm tank vent is installed in the top of the unit and that it extends full-bore to the external air
(the minimum height must be 50mm above the overflow level of the highest fixture discharging into the WALLACE
UNI-SAN) or terminated elsewhere as described in the current Building & Plumbing regulations.
DO NOT use air
admittance venting devices
as they do not let air out of the tank, eg: a "Hunter Valve".
6. It is important from a health and safety reason and for the protection of property, that an overflow relief pipe is
plumbed and delivered to a safe and visible area in the event that the discharge flows into the UNI-SAN exceed
the pump hydraulic performance capability or caused by a mechanical failure or a pipe blockage. Pumped
appliances and water supply can be safeguarded as per Section 10.4 (Overflow).
