2 Litre Water Heater Expansion Vessel And Check Valve kit SF3

Depending on the individual installation location additional accessories for your electric hot water heater may be required to comply with current water regulations, the SF3 2 litre Electric Water heater expansion vessel kit and check valve is designed for locations with a water pressure of 4.2 bar and cold water draw off near by. This type of 2 litre electric water heater expansion vessel kit is ideal for use with our Hyco speedflow SF10 and SF15K unvented electric water heaters.

Electric Water Heater Expansion Vessel Kit Installation

It is recommended that the electric water heater expansion vessel kit systems are installed by a competent plumber when expansion tanks are used in domestic hot water systems; the tank and the diaphragm must conform to drinking water regulations by installing a check valve and must be capable of accommodating the required volume of water required within the system. 

electric water heater expansion Vessel kit

An expansion vessel is a small container or tank divided in two by a rubber diaphragm. One side is connected to the pipe work of the heating system and therefore contains water. The other, the dry side, contains air under pressure, and normally a car tyre type valve for checking pressures and adding air. When the heating system is empty or at the low end of the normal range of working pressure, the diaphragm is pushed against the water inlet; as the water pressure increases, the diaphragm moves within the expansion vessel compressing the air on its other side.

Purchase a 2 litre electric water heater expansion vessel kit including a check valve

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Electric Water Heater Expansion Vessel Kit Information

In the past, domestic plumbing systems often contained more air than they do currently, and the trapped air acted as a crude expansion tank. In new and upgraded systems, expansion tanks are used more frequently than in the past.

In the UK, prior to the use of sealed expansion tanks, “open” tanks were installed in the roof space to accommodate the water’s expansion; these had the disadvantage of being exposed to the cold air in the roof space. This system, without effective loft insulation, could fall below freezing, and could cause the pipe work supplying the tank to freeze. However with good pipe and tank insulation, this was in practice quite rare.

Although such systems were remarkably trouble free, there are concerns about the water from roof tanks due to the possibility of contamination entering the system. The other major disadvantage is that the water pressure from a roof tank is considerably lower than mains water pressure, making the use of mixer taps sometimes unpredictable.

Hyco Water Heater

 

Diagram showing installation of a 2 litre electric water heater expansion vessel kit and check valves with our Speedflow water heaters.

Buy Speedflow unvented water heaters

Speedflow SF10 compatible with our 2 litre electric water heater expansion vessel kits

Speedflow SF15K compatible with our 2 litre electric water heater expansion vessel kits

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