We are open 7 days a week, 9am to 5pm Monday to Friday & 10am until 3pm weekends (Winter Hours and Bank Holidays vary) 

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

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

Determining the Total Dynamic Head is very important in matching your pump selection to the amount of pipe, and naturally the size of your pond. Use the TDH Calculator below.

Select the first 5 options; then enter the values for the first four.
The Total Dynamic Head will be calculated based on your information.

Total Dynamic Head Calculator
Pump Flow Rate Pipe Diameter (ID) Pipe Length Differential Elevation Pipe Material Total Dynamic Head (TDH)
Select Pipe Material