FAQ

What material is the chamber made of?

•  The collar and cover is made of UV Stabilized ABS - ABS has very high impact strength.

•  The riser and body are made of PP (polypropylene) - this material is very resistant to chemicals. The piping systems for most laboratories use PP as it is able to withstand very strong acids and alkalis. Our chamber has even been tested by SIRIM with hot water flowing through it at 90 degrees Celsius.

 

Why should I use a plastic inspection chamber instead of the normal brick chamber?

Brick Chamber	Chezy PP Inspection Chamber
1. Ugly cast iron cover – which rusts after a few years, has no sealing properties and is easily stolen.	1. Aesthetically pleasing cover (300kg or 1500 kg load). Cover is locked down with 4 stainless steel screws and is sealed by means of a rubber gasket – air and water tight.
2. Average weight of brick chamber is around 150 – 180 kg, very prone to sinking as it is heavy. It will crack, leak etc when it sinks or when it is used in soft ground.	2. Weight is only 10kg, will not sink or float as the incoming and outgoing pipes are strong enough to support the chamber. It will not sink.
3. All joints for incoming and outgoing pipes are made with concrete. These joints WILL DEFINATELY CRACK (hair line cracks) as PVC and VCP pipes do not bond to concrete. This leads to leakage, in and out of the brick chamber.	3. All joints for incoming and outgoing pipes are made with EPDM rubber rings which are UV and Ozone resistant. Minimum life span of 50 years. Tested by SIRIM not to leak at 0.5bar (15 feet head of water) pressure. Rubber ring joints allow for 3° deflection of the pipe and are still water tight.
4. Bad workmanship and prone to cheating. Inside face of brick chamber is to be plastered with ½ inch thick of high Alumina cement. 99% of contractors use normal cement and skim coat only. Very poor workmanship. Inside face of chamber is very rough and prone to pitting as the corrosive nature of sewage will attack normal cement. Good breeding ground for cockroaches.	4. Internal surfaces, dimensions etc comply with British Standards. Mirror finish does not allow for breeding of cockroaches. Very, very chemical resistant and does not rust or corrode. Very long life span as PP (Polypropylene) is chemically inert. The Chezy chamber will last longer than the incoming our outgoing pipes. It will last for generations.
5. Expensive and labour intensive.	5. Very economical, cheaper by at least RM50 per chamber and takes 60% less time to install than the brick chamber.

How many inlets are allowed into the chezy PP Inspection Chamber?

•  Our chamber comes with five inlets for uPVC pipes (100mm) and it has one outlet. The outlet allows for connection to UPVC, HDPE corrugated pipe or vitrified clay pipes of diameter 150mm.

To what maximum depth (buried) can the Chezy Inspection Chamber be used?

•  It can be used to a depth of 1.25 meters (4 feet) safely.

Can bends be used in the underground piping before connecting to the chamber?

•  Yes, if bends are used, 45° bends should be used and they should be placed as close as possible to the chamber. The building regulations 2000 ( UK ) - drainage and waste disposal states “Any bends should be limited to positions in or close to inspection chambers or manholes”.

Does the Chezy Inspection Chamber have SPAN / Indah Water approval?

•  The approval of both of the above is not required, as the Chezy Inspection Chamber is used in the building compound. They (SPAN / Indah Water) are only involved in the main sewer line.

Is the product approved by all the relevant authorities?

•  Yes, we have the approval of almost all the states in Malaysia . The product is also SIRIM certified to BS EN 13598-1

How do we control / adjust the depth of the chamber?

•  The depth is controlled by cutting the riser (with a saw) at the required depth. The depth of the chamber can be increased by joining the riser with socket and riser; this is done by means of the rubber rings supplied.

All joints in the Chezy PP Inspection Chamber are made by rubber rings, will they leak? What is the life span of the rubber rings?

•  No. The Chezy PP Inspection Chamber has been tested by SIRIM under positive and negative pressures of 0.5 bar (15 feet head of water) and found not to leak. The material used for the rubber rings is EPDM which is ozone and UV resistant, this material is used for rubber rings in pressure piping systems and has a minimum life span of at least 50 years.

What is the life span of the Chezy Inspection Chamber?

•  Plastic does not rot on corrode. The Chezy Inspection Chamber will last for generations. The material used is Polypropylene which is very chemically inert; it can easily with stand ground and household chemicals. The chezy PP inspection chamber will easily out live the incoming and outgoing pipes.

How do we service the Inspection Chamber if there is a blockage?

•  Remove the four stainless steel screws on the cover and lift the cover up. Use a flexible rod to clear the blockage. Please click on our video link for a demonstration on how it is done.

What load can the cover of the Chezy Inspection Chamber take?

•  We have 2 types of cover (both plastic).

- Medium duty – 300kg (not subject to light vehicular traffic – behind the house, garden, etc)

- Heavy duty – 1500kg (subject to light vehicular traffic – in the house drive way)

Are the outlets suitable for all kinds of underground pipes?

•  Yes. Our Inspection Chamber can be used with VC Pipes, uPVC and twin wall corrugated (HDPE) pipes.

What if we do not need to use all inlets into the chamber?

•  The Chezy Inspection Chamber comes with 2 free plugs to blank off unused inlets. Additional plugs can be purchased if more inlets need to be plugged.

Your Chamber has a diameter of 315mm. Is this size sufficient for maintenance, etc?

•  Yes. There is no problem for Roding and the clearance of blockages, etc. Please click on the video link for a demonstration.

What if there are more than 5 incoming pipes into the chamber?

•  The Chezy Inspection Chamber can have more inlets by placing an additional body in the chamber, please go to the various configuration section and look at No. 6. The top layer should be used for gulleys. The overall depth of the chamber will be increased if an additional body is used.

Is there a gradient in the central channel of the chamber?

•  Yes. There is an in built gradient of 1.5 degrees. All liquid and waste entering the chamber will easily flow out of the chamber.

Do you have a straight through inspection chamber without inlets?

•  Yes. Please go to the various configuration sections and look at No.4.

Do we need to concrete surround the frame / collar at the top of the chamber?

•  In areas not subject to light vehicular traffic, it is not necessary, but it is recommended to have a 2 inches x 2 inches concrete surround for aesthetic appearance, for areas subject to light vehicular traffic, a concrete surround of 6 inches x 6 inches must be used.

What type of bedding is required for the Chezy PP Inspection Chamber?

•  Normal Ground - 100mm layer of compacted granular material (max 10mm particle size) below the central channel of the inspection chamber.

•  High Water Table - The chamber base is to be placed on a 100mm (4inches) concrete slab.

Do we need to vent the inspection chamber?

•  Generally, the Chezy PP inspection chamber is meant for buildings up to 4 stories high (where the main stack is 100mm – 4inches in size). The main stack entering the chamber acts as the venting stack and is sufficient to vent the inspection chamber. No additional venting is required.