Floplast
D915

Inspection Chamber Riser

  • Description
  • More Details

Description:

450mm. Use with 5-inlet inspection Chamber. Can be cut to size in 60mm increments with an additional 60mm at the top. Can use a maximum of 12 risers to meet the maximum inspection chamber invert depth of 3m.

Features:
Effective Height 235mm
110mm PVCu
Ring Seal Joints
Suitable for Gravity Drainage & Sewerage
Install to Depths of 10m

Dimensions:
450mm internal diameter. Height 235mm. Ensure sealing rings (Quote 23863) are used in conjunction with each riser section

Installation Guide -

Universal Gully Trap with access facility

The gully should be assembled out of the ground.

Place the gully on a substantial base e.g. Pre-cast concrete slab, bricks etc and stabilise by concreting base up to the level where the supporting feet meet the gully body. Ensure that concrete does not enter the ring seal joint. Connect the Access Bend (D169) onto the 45° spigot end of the gully using FloPlast Silicone Lubricant to assist with easy insertion.

Make connection to drainage run using Socketed Pipe (D146).
Backfill with suitable material to the required level.
To complete the access installation, set in concrete an airtight
340mm Sealed PVC Cover and Frame (D830).

.

Back Inlet Bottle Gully (BIG)
Screw down, hinged rectangular heavy duty hopper.
Heavy duty circular hopper available (D540).
Both hoppers allow for height adjustment of 32mm.
Sealed dip tube easily removed for rodding purposes.
Gully riser allows an increase of invert depth up to
200mm (D505). Maximum of one riser only.
Back inlet socket plug easily removed.
No need to drill.

Inspection Chambers (Polypropylene)

FloPlast 300mm Mini Access Chamber and 450mm Large Inspection Chamber offer an alternative to traditional manholes and may be used in depths of up to 600mm for the MAC, 1200mm and 3000mm for the Large Inspection Chamber.

300mm Mini Access Chamber (MAC) FloPlast innovative design for the MAC, brings unrivalled flexibility to the underground drainage market. The MAC has flexible connections for all inlets allowing a 10° movement in any direction.

This is of great assistance to the installer where the connecting pipes are not perfectly aligned with the MAC inlets. In many instances it will eliminate the need to install an extra bend and provide a saving on the cost of the installation.

In addition, the variety of inlet combinations available on the FloPlast Mini Access Chamber and the choice of two chamber risers, 100mm and 200mm, provide installers with a significant advance in the ease of which they can plan and install their drainage system. The MAC base is designed to facilitate the stacking of bases on top of one another to give a space saving storage.

In summary, the FloPlast Mini Access Chamber design and flexibility provides a practical, innovative and cost effective solution for the provision of access in a drainage system.

BS 7158: 2001 Plastic Inspection Chamber for drainage.
UK Patent No. GB2357127.

450mm Diameter Large Inspection Chamber (LIC) FloPlast product innovation is again demonstrated with its 450mm Diameter Large Inspection Chamber.

To comply with the changes to Approved Document H of The Building Regulations 2000, significant research and development has gone into the design of this unique product. The Chamber base incorporates five 110mm flexible inlets, which allow 10° of movement in any direction.

The plastic cover and frame can take loadings of up to a maximum of 35kN. Should the connection of D930/D931 cover and frame be required directly to the base D900/D910, then riser D915 must be used and cut to suit, by cutting just above the bottom most large flange/rib.

(Please ensure Sealing Rings are used in conjunction with each riser section). FloPlast installation details are concise, however they are provided as general guidelines only.

FloPlast recommend that reference should be made to the appropriate Codes of Practice for Underground Drainage Systems.

European Standards BS EN 752: 1997 Drain and sewer systems outside buildings and BS EN 1610: 1998 Construction and testing of drains and sewers, have been introduced. These have replaced British Standards BS8301 (Code of Practice for Building Drainage).

Installation Guide

Trench Detail and Backfill Material
The trench should be constructed 300mm wider than the outside diameter of the pipe to be installed.Where the “as dug” material is suitable, the bottom of the trenches may be trimmed to form a pipe bed. The material can also be used as a sidefill and backfill. Imported granular backfill materials such as pea shingle, used in accordance with the recommendations of BS5955 Part 6: 1980 Appendix A, having a nominal particle size not exceeding 10mm, should be used as required up to and over the crown of the pipe. When this has been achieved the “as dug” material can be replaced into the trench. Once 300mm of material has been replaced, mechanical compaction can commence.

Testing
Testing of all drainage installations should be carried out in accordance with the requirements of the appropriate approving authority, using either air or water testing. References should be made to current editions of Building Regulations (Approved Document ‘H’) BS EN 752:1997 and BS EN 1610:1998.Where drainage appears inside buildings BS EN 12056 should also be consulted.

Jointing
Pipe End Preparation
When cutting pipes ensure that all ends are chamfered and are free
from swarf, grit and dirt.

Ring Seal Joints
The FloPlast Ring Seal Joint acts as both a seal and expansion joint.
The following sequence should be adhered to:
> Check that all ring seal sockets are properly located in their recessed position.
> Ensure spigots and ring seal sockets are dry, clean and free from grit and dirt.
> Lubricate all ring seal fittings. This will allow for a fast and efficient connection.
> Ensure all pipes and fittings are in the correct position.
> Insert pipe fully into the socket, then withdraw pipe by a minimum of 12mm. This will allow for expansion.

Adaptors
External rainwater downpipes can be connected directly to a surface water drain or, depending on the design, via a gully trap to the underground drainage system. The diameter of FloPlast’s 110mm PVC-U above and below ground drainage systems are the same and therefore a direct connection may be achieved without the use of an adaptor.Where rainwater pipes connect directly to a drain, a suitable reducer will be required as follows:

SP96 110mm x 68mm Rainwater Adaptor for round downpipe. RDS2 should be used with SP96 for connection to 65mm square downpipe.
D96 Universal Rainwater Adaptor for square and round downpipe.
D95 UniversalWaste Adaptor for 32mm, 40mm and 50mm waste pipe connection to 110mm Soil/Drainage.

Connection to other materials such as Cast Iron, Supersleve and Hepsleve, is achieved by the use of a range of rigid and flexible couplings and adaptors.

Access and Rodding Points
Access is very important on all installations for testing, inspection, and removal of any blockage or debris. Rodding in both directions can be achieved by using a Mini Access Chamber (MAC) or 450mm Large Inspection Chamber (LIC) in conjunction with access fittings. Rodding points are more commonly used in storm water drainage systems where the rodding point is located at the head of the drain run connection to a chamber, and being no further than 22 metres away from the chamber. The rodding point should be enclosed in a concrete surround to provide support and to ensure that it does not become mislaid at ground level.

Inspection Chambers
Mini Access Chamber (MAC)
A mini access chamber has a relatively narrow riser shaft, and is used for inspecting, clearing, and rodding a drain line. The narrowness of the riser shaft permits limited clearing and rodding to a maximum depth to invert of 600mm. Any unused side connections should be sealed with a plain socket plug. Should bends be required to change direction, these should be sited at the point of entry to the chamber. Side branches of the chamber should not be used to change direction of the main flow, as a self-cleansing flow through the chamber cannot be guaranteed. Intermediate depths can be achieved by cutting a riser at the indicated points. The frame and cover should also be adjusted to suit the level of the adjacent ground and surrounded in a minimum of 50mm of concrete.

Large Inspection Chamber (LIC)
incorporating Non Man Entry
Restricted Access
Cover & Frame

The large diameter of the riser shafts of inspection chambers enables them to be installed to a maximum depth to invert of 1200mm when used in conjunction with a 450mm opening cover and frame.

The chamber complies with Approved Document H of the Building Regulations 2000 by using the 350mm reduced opening cover and frame for installations over 1200mm up to a maximum of 3000mm invert depth.

The chamber is installed on a suitable bed dependent on the quality of the trench and backfill materials. Backfilling is continued up to approximately 50mm of the finished ground level. The frame and cover are placed on a bed of concrete around the top of the uppermost shaft, and adjusted to the finished level.

The frame is securely fixed through the wall of the chamber at the set location points using self-tapping screws. The cover is then secured to the frame with the captive screws. It is impossible for the cover to be removed without undoing the screws.
Intermediate depths can be achieved by cutting the riser at 60mm intervals; the frame also has 55mm of telescopic adjustment. Any unused side connections should be sealed with a plain socket plug. Should bends be required to change direction, these should be sited at the point of entry to the chamber. Side branches of the chamber should not be used to change the direction of the main flow, as a self-cleansing flow through the chamber cannot be guaranteed. Should the connection of D930/D931 cover and frame be required directly to the base D900/D910, then riser D935 must be used and cut to suit, by cutting just above the bottom most large flange/rib.

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