If you are doing bathroom renovations or upgrading your heating and water system, pipes and fittings are needed.
Fittings are parts that connect water pipes to each other at joints, turns, branches and transitions. Before choosing them, it is important to figure out which ones fit what.
What are the pipes?
Pipes are made from a variety of materials. They are steel, corrugated, copper, metal-plastic, polymer, polyethylene.
Their service life, strength and ability to withstand water shocks depend on the material of the pipes.
For water supply or underfloor heating, pipes with a diameter of 10–20 mm (½ ”, ¾ ”) are chosen, pipes of 25–40 mm (1 ” – 1.5 ”) are suitable for risers of heating systems. When choosing the diameter of water pipes, a simple rule applies: the longer the entire system and the more connections, turns and bends in it, the larger the pipe diameter must be in order to ensure the working pressure in it.
The pipe wall thickness is directly related to the internal pressure in the system. Heating systems use pipes with a wall thickness of 2–3 mm, and for water supply pipes with a wall thickness of 1–2 mm are sufficient.
All parameters of the pipe are indicated in its technical characteristics. For example, the PE number 20 × 2.0 means the following: 20 is the outer diameter of the pipe, and 2.0 is the wall thickness.
What is the peculiarity of steel pipes
Chrome plated steel pipes are one of the most practical options. They will last over 50 years, do not expand too much during heating, and can operate at high pressure temperatures. If there is no water in such pipes even for a short time, they can rust faster.
Steel pipes are very durable, airtight and inexpensive.
Minus: they are prone to corrosion, which reduces their operational period. Steel pipes are large and weigh a lot and must be installed by a qualified worker. They are not very flexible, so you need to buy and apply additional parts that are used for the connection.
Corrugated steel pipes are more expensive, but are even more durable and can withstand high pressure, have good heat dissipation, and are also easy to bend. They are suitable for organizing heating and water supply systems in confined spaces. With proper installation, steel pipes will last up to 20 years. However, such pipes are noticeably heavier than their plastic and metal-plastic counterparts, are susceptible to corrosion, can leak over time, and the internal lumen can become clogged with salt deposits.
What kinds of fittings are suitable for steel pipes
Threaded fittings made of steel, brass, or ductile iron are needed to connect metal pipes. They should be installed when connecting metal radiators to the heating line.
Threaded fittings should be inspected periodically as the nuts may loosen over time and need to be retightened. If the diameter of the pipes to be fastened is less than 40 mm, use threaded fittings, and if more, use flange connections, since threads of this diameter are not easy to tighten with a hand tool.
You can use angles, crosses, tees, couplings, locknuts, adapters between different diameters.
Plugs are also suitable if you need to restrict the water supply during repairs, installation of a plumbing or sewer system, or in case of emergencies in the house.
Cast iron, brass and SGP fittings malaysia are required to hold pipes and flexible hoses together. They will help to reliably connect them during the transition from the threaded part of the pipe to sections without it. For better tightness, the connection can be reinforced with an O-ring by sliding it over the hose.