How To Install A Doulton® HIS Push-Fit Water Filter | Doulton® Water Filters

Made from high-quality stainless steel, the Doulton® HIS Push-Fit Water Filter is an attractive, cost-effective and easy-to-use drinking water filter.

Follow our instructions to discover how to install the HIS water filter system:

Selecting a position for the filter:
1. The filter should be fixed inside a unit or to a wall with the screws and bracket provided, near to the incoming water supply and the user tap. Make sure that the filter is located so that the connecting pipework does not have any sharp bends in it. For easy servicing of the filter, there should be at least 4 inches of clearance below the body of the filter to allow for removal of the filter element for cleaning or renewal.

Connecting pipework and fittings:
1. An isolation valve and non-return valve should be fitted upstream of the filter (these are required by law in the UK). The isolation valve may be used to regulate the maximum flow rate in accordance with the requirements of the filter element used.
2. Having selected the appropriate fittings, a user tap should be installed in accordance with the manufacturer’s instructions in a convenient position and then connected to the filter.

Assembling and fixing the filter:
1. Fit the bracket to the filter head using the 4 retaining screws provided and then having chosen a position for the water filter, mark the position of the bracket fixing screws onto the wall/unit.
2. Attach the filter head to the wall/unit with the 2 fixing screws provided.
3. With the water supply isolated connect the upstream and downstream pipework to the filter head ensuring that the arrow on the top of the head is showing the correct direction of flow and that piping/fittings are pushed into the push fittings to a minimum of 18mm (.75”) depth.
4. Ensure that a sealing washer is fitted onto the filter element threaded mount stem and screw the filter element into the filter head until washer resistance is felt. Do not over-tighten.
5. If there is less than 10 inches clearance below the base of the filter housing, place the filter body in position over the filter element before screwing the filter element into the head.
6. Moisten the O ring on the filter body, check that it is located correctly and then screw the filter body to the filter head. Hand-tighten only.

Conditioning the ceramic filter:
1. The filter system should now be ready for pressurisation. With the user tap in the on position, gradually open the upstream isolation valve until the flow from the tap has stabilised at the recommended flow rate.
2. Close the user tap and ensure that the system is watertight.
3. In order to remove any loose particles resulting from the manufacturing process or from cleaning the filter element, it is recommended that the first supply of filtered water should be run to waste for 10 minutes.
4. For a new filter element, the maximum flow rate will be achieved once the ceramic filter element has become fully saturated; to allow the filter element to be conditioned to the source water, allow the unit to stand unused for a further 24 hours and then run the first 15 litres of water to waste.
5. The filter is now ready for use.