Washing Machine Plumbing: What You Need To Know

What do you need to know?

The washing machine is essential to modern life. Having a washing machine and doing your own laundry not only reduces dependence on professional cleaning service providers but is also significantly cheaper. While washing machines are incredibly simple to operate, most users don’t know the plumbing systems of the washing machine well. So, if anything were to happen to the plumbing system, they would be clueless.

Here is a detailed article for you to understand washing machine plumbing. For exterior parts, the plumbing is straightforward. There are two pipes – one serves as a freshwater inlet and the other as a wastewater outlet. Some machines may have two inlet pipes – one for cold water and then another one for hot water. High-end machines may come with a built-in water heater and would require only a cold-water inlet.

Tap washer

In order to attach the inlet tubing to the tap, a washer needs to be attached to the tap. Make sure that the diameter of the plumbing is same else there would be pressure problems or leakage of water.

Supply regulator

Some areas may have too much water pressure at the tap. If this exceeds the maximum pressure required at the inlet, there is a chance of damage. In this case, a regulator can be attached after the washer to decrease the pressure to the required level.

Machine Installation

During installation, the machine must first be put on a level surface, and the levelling screws adjusted to get a steady fit. Use a pressure gauge to check the pressure of water and set the pressure regulator to the recommended pressure before starting to attach the plumbing. The tap washer and the water pressure regulator need to be attached firmly, and then the inlet tubing can be attached to the tap and secured by tightening the bolt.

Similarly, the other end of the inlet needs to be bolted on to the inlet port of the washing machine. In case there are two inlets (hot and cold), make sure you are connecting them correctly. Bolt the waste water hose to the outlet port and let it into a drain.

man installing washing machine


Washing machine plumbing wears out fast. Here are some of the points of failure which you should carefully observe: Inlet washer: If the gasket of the washer has got eroded, water will start to leak from there, and if the leakage is significant, the washing machine may not get enough inlet pressure to work correctly. If the inlet hose beings to leak, it is time to replace it.

To replace it, just open it at both ends and bolt the new hose, the connectors may become rusted and jammed. Be especially careful with the inlet port at the machine because if it gets damaged, then an expensive repair would be required. The same goes for the outlet hose. Inspect if for damages. If you feel that the pressure in the system has reduced, there could be a blockage at the tap or the inlet port of the washing machine. Cleaning it with pressurised water will typically solve your problem. For damages to parts that are secured to the machine, you may need to call a professional to service your machine or send it to a service centre for repair.

Thank you for reading this blog post. We have gone over a couple of simple fixes for what may actually be a more complex issue. Therefore, if you have any issues, it is always recommended to call a professional. Here at Corvee Services, we are experienced in dealing with all kinds of plumbing, gas and heating issues etc. If you have any queries, call us today on 01536 680920, or visit our contact page.

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