Hot Water Installation

Basics -the plumbing for hot water is in principle the same as for cold, but there are certain additional factors that apply to hot water systems, and these must be taken in account (e.g. Iength and diameter of pipes, insulation, safety devices, etc.).

Layout of pipelines -connection of hot water storage tank and collectors to be of shortest possible distance.


ariston solar water heater


-Pipes should not be exposed to the weather if possible. (keep pipes inside the house where possible).

-All connections must be of good quality.

-Adequate spacing must be left for insulation (insulation thickness: 30 to 50 mm).

-Air valves and drainage valves must be in accessible places.

-Layout must allow complete drainage of the entire system.

Diameter-pipe diameter depends on different factors, such as:

- Consumption/time unit

- Total quantity/time

- Length, Materials, etc.


To ensure trouble-free functioning there must be a safety device for the release of over-pressure due to the increase of volume by heating. This is normally a safety valve and a non-return valve (check), or a non-return valve and a vent pipe.


Note: In a low pressure system using a separate feed tank (as in installation example No. 6), over pressure safety devices are not required. If 100 liters of water are heated from 10 to 70 Centigrade the volume will increase by 1.08 liters!


Distribution systems -a choice of different systems is available. One should choose the system best suited to the individual circumstances. For large buildings a central hot water system, having well insulated pipes, may be best.


For smaller installations, the single pipe system (one pipe for one tap) is usually preferable. For solar heater water with thermo-siphon circulation this is the best solution.


Note: It is important to have several separate pipes from the heater to the taps to reduce heat losses (smaller pipes) and to give a convenient and fast supply of hot water to the user, with a maximum delay of about 10 to 20 seconds. Pipes concealed in cement or in brickwork must be protected against heat loss with a corrosion-free bandage of at least 5 mm thickness.


For more info contact Ariston Solar Water Heater or call us at +971 4 252 2966


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