Description Burtons Water Level Top Up Box for Ponds The Burtons Top Up Box is a great way to add a top up and overflow to your pond. With an adjustable float valve and overflow you can get your pond level just right ½” inlet from mains 50mm outlet to pond 50mm overflow Supplied with lid Fixing points Overflow set to 160mm down from the top of the unit (can be adjusted by adding a 1 ½” rubber socket) 50 mm outlet and overflow should be connected with rubber fittings
