Open 7 days a week, 9am to 5pm Monday to Friday & 10am until 3pm weekends (Winter Hours and Bank Holidays vary) ** 29th and 30th June 10am till 2pm due to the National show ** 

Come and see us at the BKKS National Koi Show 29th and 30th June, Heart of England Centre, CV7 8DX

Summer offers - Get 10% off all Evolution Aqua products, use code GET10 at checkout.

This is a pair of diaphragms mounting blocks for the HP 40. Both diaphragms should be replaced at the same time.

For instructions on how to replace the diaphragms please see our downloads page.

We aim to dispatch orders received before midday Monday to Friday on the same day where possible. In most cases our items are available for 1 to 2 day delivery at a competitive price and are trackable via DPD or APC.

Delivery costs for standard items in the UK - £5.95

(Surcharges do apply to remote postcodes)

Heavy items - £9.95

Pipe - £14.95

Palletised items - Some large oversize products, typically items weighing more than 30kg, may require delivery via pallet. Standard Pallet charge is approx. £50.00. To ensure there are no delays with delivery, please include a contact number when placing the order.

Overseas – DHL and UPS, cost based on weight / volume at checkout.

Below is a list of documents that you may find useful.

Can’t find what you’re looking for? Call 01777 839176 or use our contact form

hiblow-40 (422.29 kB)