Did you know water heating is the second-largest household energy consumer? A space-saving and energy-efficient solution is the tankless water heater that provides hot water when needed. When you turn on the hot water faucet, the cold water gets carried through the pipes of the tank that’s then circulated over a series of coils that causes the water to heat.
Despite not having a tank, the tankless water heater can leak through the joints or piping. It usually starts from the bottom and runs along the connections to turn into a catastrophe. Here’s what may cause your tankless water heater to leak:
Gas Piping
An inadequate supply of gas to function the tankless water heater will hinder its performance. It’s best to best to reduce the number of joints in the gas line or run a separate gas line altogether from the meter to power the heater.
Improper Ventilation
Another culprit of leaking in tankless water heaters is improper venting that causes condensation to occur within the heater, causing leakage and subsequently, failure of the system. A proper installation of vents can minimize the occurrence of leakages through pipes and joints.
Connections in the Water Pipe
Your tankless water heater may be incorporated with a relief valve that’s located on the hot water outlet (i.e., the pipe leaving the heater to supply water to your fixtures). These come in handy when draining or flushing the tankless water system and to reduce any leakages in the joints. Therefore, it’s important to be equipped with an adequate relief valve, depending on the heater’s size.
High Flow Rate
The tankless water heater works best at a low water pressure and low water flow rates, as it’s easier to correct the issues under these circumstances. The faucet aerators must be checked to prevent the water heater from firing up.
Acidic Water and Hard Water
Acidic water flowing into the tankless water heater can affect the metal of the plumbing system, causing pinholes that promote leakages overtime. Check your water’s acidity levels to prevent damage to your plumbing lines. Likewise, the dissolved particles in hard water tend to build in piping lines that cause the heat exchanger to overheat and cause a system failure.

The best of us experiences bad days, let’s give the tankless water heater a break for having leaks!
Wasden Plumbing Services, LLC can repair, replace and install the tankless water heater for your homes in Rockwall and Rowlett, TX. The plumbing company specializes in clogged drain repair, leak repairs, toilet leak repairs, water heater replacement rowlett tx, slab leak detection, sewer line repairs, kitchen and bathroom remodeling, and gas leak detection services. Contact our emergency plumber via our 24/7 helpline!
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