Boiler Scale Reducer Aq4

Product code: SKU INST26
(£124.68 inc. VAT)
Out of stock 3-5 Days Delivery
Instanta Boiler Scale Reducer aims to reduce limescale build up that can occur over time. This is particularly important in hard water areas where limescale is more likely to happen faster.

It is an essential product because it can effect the efficiency of your boiler and many manufacturers will not honour a warranty claim if the cause of the breakdown is found to be a limescale build up.

The AQ4 is suitable for low usage situations and this filter also removes taste and odours from the mains water (e.g. chlorine.)

Technical Details:

Water pressure min.: 2 bar
Water pressure max.: 6 bar
Max Incoming Water Temperature: 35oC
Water Connection: 3/4
Height: 310mm
Diameter: 50mm


Check the availability of our products in the options above under the ‘Availability’ column. If your goods are in stock, you can choose from our ‘Next Day’ or ‘2-5 Days’ delivery option at the checkout, depending how quickly you need your goods delivered.

If your goods are currently out of stock, the ‘Availability’ column will give you an idea of how long it will take for these goods to be delivered, for example- ‘3-5 Days Delivery’. Please note that this only an estimate and goods may be available sooner or later than expected.

If you have any specific delivery instructions, please add these to the notes field in the checkout and we’ll be sure to let our couriers know of any special instructions you have regarding your delivery.


Normal Lead Time​

Cost over £75

Cost under £75

Royal Mail

(under 2kg, NI & GB Only)

2-4 Days




(NI, GB, ROI, excl. Highlands & Islands)

GB: 2-5 working days NI/ROI: next day



Next Day Delivery

(GB excl. Highlands & Islands)

Next Day



Highlands & Islands (over 2kg)

2-5 working Days



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