Horizontal Hot Water Cylinder NZ

Horizontal Hot Water Cylinder

Horizontal hot water cylinder are becoming increasingly popular for many homeowners and businesses. They have several advantages over traditional vertical cylinders, including taking up less space, being easier to install, and more efficient.

If you’re considering installing a horizontal hot water cylinder in your home or office, here are some of the key advantages.

• Space Saving
• Easier Installation
• More Efficient

How To Install Horizontal Hot Water Cylinder

• Horizontal hot water cylinders can’t be installed using a standard back to front vertical installation; instead, they must be installed horizontally (with the cylinder on top of the base) or vertically (with the cylinder on its side and running down one end).

• Before you install your horizontal cylinder, ensure that you have a sturdy base in place that can support the water tank’s weight when it’s filled. The thick plastic construction of a horizontal hot water cylinder makes it much heavier than a vertical one, so you’ll need to reinforce the floor or ground before you begin.

Carefully layout your horizontal hot water cylinder on top of your chosen foundation piece. Rest assured, horizontal cylinders can be safely and easily moved even while full of water.

• Once you’ve laid down your cylinder, attach the flanges to either end using the accompanying flange bolts and washers (fender washers included). Tighten these flange bolts securely with a spanner or socket wrench – make sure you don’t over-tighten them, as this can cause the cylinder to crack.

• Once you’ve completed step 4, attach the water feed line to one end of the tank with a bent washer and hex nut. Tighten securely with an adjustable spanner or socket wrench – do not use pliers or other tools with teeth, as these can damage the soft copper.

• Attach the flexible expansion tank to the other end of your hot water cylinder using another bend washer and hex nut. Tighten securely – again, only use tools with smooth surfaces to avoid damaging the coil of copper tubing inside your horizontal hot water cylinder.

• Now that your gas line is in place, carefully lower your electric water heater into the horizontal hot water cylinder. Ensure the heater is fully submerged in water and that the electrical cord is not kinked or trapped anywhere.

• Once your electric water heater is in place, attach the wires to the corresponding posts on the upper part of the tank. Secure with screws and a screwdriver – take care not to strip the screws, as this can damage the threads and prevent a good connection with your water heater. Once you’ve made all connections, attach a plug or switch to turn the power on.


A horizontal hot water cylinder has several advantages over the traditional vertical style. They take up less space, are easier to install, and are more efficient. They are also safer, less prone to pressure build-up when the temperature drops.


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