4 Point Checklist: Water Heater Installation

Getting a good installer

An incorrect installation may be dangerous or result in poor water pressure or temperature. After receiving some images of heater installations from homeowners, we decided to put together a quick checklist of the important things you must look out for to ensure your water heaters are installed correctly.


1. Heater Mounting

The A. O. Smith (AOS) water heater is mounted on two brackets inserted into two drill points on the wall. The upper holes of the supporting rack of the heater are mounted on these brackets. The AOS brackets may look small but they are designed to hold up to three times the weight of the water heater when completely filled with water.


Please ensure your heater tanks don’t look like they are free falling off the wall like King Kong on the Empire State Building. This is a sure sign of an incorrect installation and even if you know nothing about heaters the image above on the left should give you the creeps.

2. Water pipes


The most common choice of water pipes for residential installations are copper and stainless steel pipes. Both are equally durable. Some homeowners prefer stainless steel pipes to match their bathrooms; some prefer copper pipes as there are fewer kinks in the bends. Most people do not have a preference but if you do, the onus is on you, the homeowner to let the installer know this before the installation.


PPR or Polypropylene Random pipes may be used but this is rare and usually used for commercial purposes. Do not however, use flexible hoses for connection to your water heater as they may burst in the long run.

3. Relief valve connection


Often overlooked is the relief valve connection. Like air conditioners, water heaters give out droplets of water while in operation. These droplets are released from a relief valve. A tube is connected to the relief valve and the droplets of water are drained off into a drainage point. The tube must be downward facing.


The rubber tube is often misplaced and not installed to the drainage point. Do ensure your installer does not dispose of it with the rest of the carton boxes and packaging!

4. Mini stopcock valve

This stopcock valve is installed at the water pipe connected to the inlet (blue side). The stopcock valve comes in useful if your heater is leaking or should you need to cut off incoming water supply to the water heater for repairs.

mini stopcock valve water heater

More checklists for new homeowners

  1. HDB BTO Singapore Defects Checking
  2. Your Checklist and Guide to Moving House
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Amanda Zhong

Amanda is the bookish personality of AOS Bath. She loves reading in quiet places over a good cup of tea. Like her other Gen Y peers, she has a penchant for advanced technology that delights and engages people.

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