Purus Maxxus Tray - Manual

MAXXUS FITTING INSTRUCTIONS
22mm structurally rigid wet-deck floor former for wetrooms. Will support a sustained load of 75 stone (470 kilos) over
16” (400mm) joist centres without deflection.
Suitable for installation over timber joist, steel beams or concrete. Needs no under-boarding. An over-large Maxxus will
contain the water better.
Failure to follow instructions invalidates any warranty.
Abbreviations used: tbb = Tile Backer Board. UFH = Underfloor Heating.
Introduction and Overview
A wetroom can be fitted anywhere in any building, even an attic or basement, with the aid of a pump to assist drainage. A
wetroom is usually level access (totally flat floor) but can be raised or sunk below floor level.
We offer limited guidance on plumbing pipework and none on the electrical work needed to connect an electric shower.
Liaise with specialists for these trades.
This is the ideal time to reconsider the heating options for the wetroom area. You may be happy with radiators in an existing
bathroom. Consider underfloor heating, either connecting water pipes to an existing system or using new electric underfloor
heating. Both will require insulated tile backer board below to prevent heat migration downwards.
A key benefit of our system is that you only need to waterproof the ‘wet area’, not the entire wetroom or bathroom. This
reduces costs to a third of usual levels.
Note: All references to tile adhesive are flexible powder type – NEVER use ready-mixed adhesives in bathrooms and
wetrooms.
Tools required: Jigsaw or circular saw, power drill, spirit level, screwdriver, 50 mm screws. Hammer and chisel (for
concrete). Also may need silicone, flexible tile adhesive,mixing paddle, bucket, timber noggins.
Efficiency of the System
The system will perform provided the instructions are followed meticulously. It is possible that you or your tradesman will
fulfil a satisfactory installation and then your tiler will arrive, puncture the membrane with a trowel and patch it with silicone.
This is fatal as silicone is incompatible below tile surface except as stated at ‘Securing Maxxus’.
Critical Handling -
If tradesmen are employed to handle the drainage, the membrane or the Maxxus, they MUST BE SHOWN these instructions.
Supply Pipes and Waste Pipes -
Whether you tackle these depends on your confidence and ability. Priority is always given to running the waste pipe as
supply pipes and cables can be run anywhere. For ease try to tap into the existing drainage system. Look on the outside
wall of the property to check where the simplest pipe runs will go. On a timber floor lift a floorboard near the drainage area
to determine available space, joist depth and if other pipes or cables are in the way. The objective is to lay a waste pipe in
a horizontal or gently sloping position to an outside wall or extant pipe or soil stack. Place the Maxxus in position to check
that the drain hole does not coincide with a joist. It can be cut down to relocate the outlet hole.
It may be impossible to locate the drain with sufficient fall for the waste pipe. If so, a raised wetfloor may be necessary. To
do this construct a box of 19mm plywood and place the Maxxus on top, or purchase a 140mm Easy Set.
For supply pipes a groove or channel is needed in the wall to waist height (mixer shower) or chest height (electric shower).
When tile backer board is used it can be screwed direct to the wall but normally attaches onto horizontal slate lath (19 x
38mm battens) which then offers free cavity for pipes and cables.
mixer shower (plumbed to boiler) groove for 2 x 15mm pipes
ie 50mm wide x 25mm deep
electric shower, groove for 1 x 15mm pipe ie 25mm x 25mm
(otherwise phone a plumber)
Before Starting -
Run a spirit level over the floor to gain a general idea of the levels. The Maxxus slope is only 2% so anything out of level
will cause pooling. It may be fitted straight over joists or packed with plastic or timber packers over the length of a joist to
avoid single point loading.
As an option it may be laid on a bed of flexible tile adhesive or mortar to take up misalignment in the floor or to raise to a
higher level. Suitable for vinyl or tiled flooring.