Always hated this inspection chamber grid being on the lawn:

Funny how things change. It’s flipped 180 in estimations and become a huge blessing for this project. Can now backwash and rinse the filter, as well as water change the pond without any additional equipment or faff. Just lift hatch, put the 1 1/2 inch waste hose in and open the gate valve on the filter:

Easy peasy lemon squeezy! Job done ✅

Funny how things change. It’s flipped 180 in estimations and become a huge blessing for this project. Can now backwash and rinse the filter, as well as water change the pond without any additional equipment or faff. Just lift hatch, put the 1 1/2 inch waste hose in and open the gate valve on the filter:

Easy peasy lemon squeezy! Job done ✅