UPVC Gutter Down Pipe system complies where applicable with the requirements of BS4576:1970 and it is suitable for internal and external installations. The complete range of pipes and fitting are available in 3 sizes; 110mm, 160mm and 200mm, and they are manufactured in white color only. The Gutter Down Pipe are produced in 2 different types of wall thickness and a table is compiled as below:

Domed roof outlet grating

Domed roof outlet grating is designed with a removable push fit high dome grating to prevent blockage and it is made with high quality UPVC material with ultra violet stabilizer. This grating is offered with all the inherent advantage of plastics, strength, lightness and resistance to impact and corrosion. The grating is strong enough to withstand normal foot traffic. It is suitable to install in the reinforcement concrete roof and scupper drain or metal gutter.

Balcony drainage outlet

Balcony drainage outlet is designed with a vertical inlet grating to prevent blockage and it comes with an internal build in funnel to prevent the rainwater to flush out from the upper floor. It is recommended to be used in the multi storey apartments and low cost flats which the rainwater Gutter Down Pipe are installed exposed and it is also suitable for corridor and car park areas. With this special design fitting, the Gutter Down Pipe can discharge water in a single pipe system and it is neat in appearance.

Access pipe

Access pipe is to provide a big twist lock access door for cleaning and maintenance. The diameter of the access door is designed the same size with the down pipe, so that is easily accessible to any part of the down pipe. It is recommended to install this fitting together with the down pipe before it is connected to the underground drainage pipe (just above the ground floor level).

Pipe sleeve

The pipe sleeve is designed with many external ribs to prevent water from leaking and seepage along the external smooth surface of the UPVC pipe when inserting it into the concrete floor slab. It is suitable to use for UPVC Gutter Down Pipe system and also for soil, waste and ventilation system. The complete sizes are ranging from 32mm to 200mm, they are made to comply with BS5255:BS4514 and BS4576.

91° bend with spigot end

Specially designed bend with one spigot end (male end) for horizontal Gutter Down Pipe to run very closed to the concrete floor slab (ceiling). It is just solvent welded directly into the pipe sleeve which casted into the slab. With this way of installation, it gives a higher head clearance and also neat in appearance.

Offset bend

Bend with one spigot end can directly welded through solvent cement into the socket of the other bend. It will minimize the distance of “W” to form a narrow offset.

1st Method of Gutter Installation

1) Mark a center point on the formwork where the UPVC pipe is to pass through the concrete floor slab, then get a nail to punch a small hole on the said point. Put the Gutter Down pipe sleeve on top of the formwork so that the central hole is perpendicular to the hole already marked and fastening the sharp screw onto the formwork.

2) By fastening the sharp screw from the Gutter Down pipe sleeve central hole to the formwork the “Y” portion will naturally bend downward and force the Gutter Down pipe sleeve to clamp against the formwork firmly. This is to ensure correct and stable positioning of the Gutter Down pipe sleeve during concrete casting.

3) When the formwork is removed after the concrete floor is cast, the “Z” and “Y” portion will break off leaving the Gutter Down pipe sleeve cast within the concrete floor slab. Some touch up filling is necessary at “Z” portion before connection UPVC pipe.

2nd Method of Gutter Installation

1) Gutter Down pipe sleeve are provided with four nail hole fastening locations outside the cylindrical body. The Gutter Down pipe sleeve is placed on top of the formwork where the UPVC pipe is to pass through the concrete floor slab. Four nails are then fastened firmly onto the formwork.

2) When the formwork is removed after then concrete floor slab is cast, the nails will be exposed beneath the Gutter Down pipe sleeve. Bend the nails toward the floors slab or cut them away. Additional cement plastering will cover the bend nails.

3) Apply the PVC solvent cement on “X” portions all round for connection of the UPVC pipe into the Gutter Down pipe sleeve.

4) Please ensure that the extension UPVC pipe are fitted (without solvent cement) into the Gutter Down pipe sleeve before the concrete is cast, if the thickness of concrete floor slab exceeds the heights of the Gutter Down pipe sleeve. Remove the extension UPVC pipe from the Gutter Down pipe sleeve after the concrete floor is cast.

5) In order to have a better discharging flow system for the main stack, it is important to align the connecting UPVC pipes centre points to ensure optimum efficiency. Insert an extension UPVC pipe into the Gutter Down pipe sleeve which had already casted in the floor slab below. Then place a laser pointer pen holder onto the UPVC pipe, so that the centre point can be located at the underneath upper floor formwork. Thereafter made a nail hole and then place a Gutter Down pipe sleeve on top of the formwork, and fastening by the sharp screw.

Rainwater drainage is a gutter system which is used on outside the house to avoid the rainwater running into the brickwall or window and causing the wall decomposed, the water might go into the building too. Due to gutter system does use pipe too, so it’s also a type of piping work. Almost every houses have installed these rainwater systems to avoid the rainwater go into their houses. However, gutter down pipe is one of the element in the gutter systems or rainwater systems. The rainwater drainage is installed at the roofing area, so it’s also called as roof gutters.

What Is Rainwater Gutter

The rainwater gutter is used to redirect the rainwater from the top of the roof, followed by a horizontal roof gutters, the rainwater will be flowing into the vertical gutter down pipe, end up the rainwater will be flowing into the ground drainage system. The horizontal roof gutters must be installed in a slightly fall so that the water can be flowing to the vertical gutter down pipe, else the rainwater will be stuck on the roof gutters and the rainwater will be leaked out and running to the wall, window and buildings and causing damp.

However, the sizes of roof gutters must be large enough to carry the rainwater. Rainwater gutter must be installed to be able to control the fast flowing of rainwater and it might break the gutter system. Usually the material used for gutter down pipe is Unplasticised PVC (UPVC). The material used must be having adequate strength and durability to handle the water pressure of the rainwater. If the gutter systems is installed inside the house, pressure test must be carried out before it can be installed.