Established in 1993, Guanfa Valve Manufacture Co., Ltd. is specialized China cast iron pipe manufacturer and distributor of valves, hoses, tubes and pipes. Our oem cast iron pipes are suitable for acid, alkali, water, steam, seawater, coal gas and natural gas. They are widely used in petroleum, chemical, paper making, fertilizer, brewing and metallurgy. The use of specialized software of Pro/E and CAD has shorted the P&D and trial manufacture cycle, and greatly improved the service life and dependability of products. Our high-quality products have been exported to the North Amercia, UK, USA, Germany, Italy, India, France, Australia, Japan.

1) Drainage system comprises socketless centrifugal cast iron pipes, socketless fittings,joints (couplings or clamping components) and accessories
2) As a reliable and inexpensive drainage system, it is an ideal choice for building drainage system because it is solid and durable with excellent noise suppression,
fire resistance, low thermal expansion and chemical resistance
3) It facilitates to install
4) Made from cast iron exceeding ISO185 grade 150 grey iron standard
5) Centrifugal cast iron pipe: our pipes are made by centrifugal technology rotating at high speed and possess a dense, pure and homogenous microstructure, even
wall thickness and smooth appearance
6) Epoxy coating: our pipes and fittings are coated with epoxy paint
7) Stainless steel couplings: our couplings or clamps which are capable of resistance to corrosion and anti-aging are easy for installation
8) They can also come with an electrical continuity clip to protect high buildings against thunder

The cast iron drain pipe does not have to be used in the entire plumbing system. Plastic pipe is a great choice for the vent system. Plumbing drainage pipes contain air before water drains down the pipes. As water enters the pipe it displaces the air. The air needs to be replaced. This is accomplished by a network of pipes that extend from the drain pipes up to the atmosphere at roof top level. Since the in-rushing air doesn't create vibrations, the plastic vent pipes will be whisper quiet.
Working with the cast iron drain piping is not much different than plastic. The biggest challenge is cutting the pipe to length. This can be done with several tools. You can rent a cast iron snapper that actually cleanly cracks the pipe to the desired length. An abrasive cut-off saw with a special metal cutting blade can also be used. The least desirable tool in my opinion is a reciprocating saw with a coarse metal blade. If you use this saw, you have to pay attention in order to make a straight cut.

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