Solar water heater from pond liner

Step 4: The adapting hose

To attach your prevalent water-hose you might want to have some adapters. Therefore we need to glue in some PVC-tubing with suitable adapters. I used a 16mm outer diameter tubing for this purpose, because it was cheap and wide enough for suitable adapters. Try to straighten the tubing and then glue the mattress around the tube for at least 10cm. There will nearly always be a small leakage in this connection, but that shouldn't worry you too much.

It is up to you where you want to attach the inlet. I decided to make both connections on one side, so I could get easy access to both. But you might also, especially in connection with the S-shape, connect the tubes on opposite sides of the mattress. It's up to you!