Step2:   Place gully into position.     Step3:   Solvent-weld waste pipe to outlet socket.     Step4:   Bring floor screed up to level with bottom of gully inlet.     Step5:   Allow screed to set, and remove gully inlet.     Step6:   Apply waterproof masrtic to underside of square flange of gully    inlet.     Step7:   Solvent cement gully inlet into position.     Step8:   Title up to inlet, and grout using waterproofgrout. FIXING TECHNIQUES

Cosmoplast uPVC drainage pipes and fittings should be installed tension free and with lateral allowance for thermal expansion compensation.  Suitable sound absorbing brackets with rubber lining should be used to support pipes. Those brackets must be dimensionally compatible to the pipe diameter. The fixed bracket creates fixed point in the pipe system.

With fixed brackets the pipe or fitting cannot be moved through the bracket after screws are tightened. In order to prevent sliding down of vertical pipes, each individual pipe must be secured on one point by a fixed bracket. Every horizontally installed pipe should always be fixed with one bracket. All remaining pipe brackets in horizontal as well as in vertical installation must be tightened in such a way to allow sliding. During installation of horizontal pipes, the bracket distance should be approximately ten timed the outside diameter of the pipe. While for vertical installations, brackets are required every 1 to 2 meters depending on the size of the pipe. Pipe brackets should not be installed in areas of diameter reduction and change of directions in the system; this is required to allow for the thermal expansion. Pipe brackets should be fixed on building materials with high strength in order to assure strong and durable pipe fixing. Fixed brackets must be installed directly above the fitting at the bottom of the pipe end. The sliding bracket must be installed at a distance of maximum of two meters above the fixed bracket. In m8ulti-storey buildings, the drainage pipes of diameter 110mm or bigger are installed inside the mechanical ducts.

SOUND INSULATION

In order to achieve optimal sound insulation it is highly recommended to consider the local building regulations and codes where applicable.Waste pipes should not be projected in living, sleeping and working rooms. Whenever waste pipes are required to be fixed on walls adjacent to living and sleeping rooms, the construction of those walls should be particularly constructed with specific weight of at least 22 kg/m2.The same requirement is also valid when installed in a shaft and fixed on the intermediate wall. The pipes must be free from the plaster layer, avoiding.eventual sound bridges by either using appropriate  pipe support with rubber lining or by wrapping a layer of mineral wool around the pipe.

It is recommended to prevent abrupt directional changes when changing the flow direction on long pipe installations. In such cases, it is recommended to change the direction from vertical to horizontal by using two 450 elbows interconnected a short piece of pipe with minimum length of 25cm instead of using one 870 elbows. It is always recommended to use clamps with rubber lining for fixing the pipes for optimal sound insulation.

MAKING SOIL PIPE OFFSETS ON-SITE

This connection is required to offset soil pipe run (e.g. to by-pass a gutter), and can be easily created on-site with a length of soil pipe and bends. Steps1: Measure projection (P) required to take pipe past obstruction.   Step2: Determine length of pipe required, noting minimum offsets possible.   Step3: Square-cut pipe length and de-burr cut ends.   Step4: Solvent-weld or Push-Fit into standard bend or offset bend sockets.

General Principles: ·      ·        All pipe work must be adequately supported whether vertical or horizontal. ·        Plastic pipe work expands and contracts with changes in temperature or from the nature of the discharge through the pipe work. Expansion joints must therefore be provided to accommodate such thermal movement. ·        Pipe brackets must be used to anchor expansion joints. Intermediate support must also be provided to steady pipe work between the points. ·        Horizontal pipe work requires more frequent support than vertical pipe work(for example soil stacks) ·        On long suspended soil pipe runs (e.g. in basement areas), sliding joints should be installed to control the effects of thermal expansion. ·        Pipe work should always be supported close to any change of directions ( e.g. bends or branches)

General Information:   All pipe work must be adequately supported whether vertical or horizontal. Plastic pipe work expands and contracts with changes in temperature-whether ambient temperature or forms the nature of the discharge through the pipe work. Pipe brackets must be used to anchor expansion joints. Immediate support must also be provided to steady pipe work between these points. Horizontal pipe work requires more frequent support than vertical pipe work. Pipe work should always be supported close to any change of direction. In multi-storey buildings, it is recommended that thermal movement is controlled by an expansion joint at each floor level.

Note: It is recommended that only steel brackets (i.e. not plastic brackets) be used on interior                   soil stacks which are subject to fire regulations.   Any point where pipe work passes through a floor or wall and is made as a fire stop, it must be treated as a fixed point for  the purposes of determining positions of expansion joints. Thermal expansion of upper section of soil stack may be allowed through roof to vent cowl provided the stack pipe is allowed to move freely through the roof.

HORIZONTAL INSTALLATION

VENTILATION

VENTILATION VALVE

Ventilation valve must be installed ina vertical position above the flood level of the highest appliance connected to the stack. Valves should be installed ventilated duct or roof space where is no risk of freezing and must be accessible for inspection and testing.

When connecting small waste pipes to vertical discharge stacks, attention should be given to avoid the cross-flow from one branch to the other. The restricted entry zone (L) for the opposite waste pipe varies depending on the stacks diameter, connections are allowed at right angles of  the boundary center line or directly opposite. In case of cross flow from a large diameter to a small waste pipe, the cross flow should be prevented by connecting the waste pipe at or above the center line of larger branch. Connections are allowed at right angles of boundaries center line or directly opposite. In this case the restricted entry zone is always 200mm regardless of stack diameter.