15 Year Life From The Date of Installation Wall flow: 1120 GPM Floor flow: 1432 GPM Cover only, 30" x 30" — This cover easily installs over existing main drain and the only solid fiberglass VGB drain cover available. Requires no grounding to the pool shell and is completely resistant to corrosion. 30" x 30" grate size allows main drain up to 24" x 24" to be covered. Aegis VGB cover includes stainless steel mounting hardware.