HydroLogic® BIGboy™ Replacement PVC Float Valve - 3/4in

Restore Unattended Fill Control to Your BIGboy Reservoir

The HydroLogic® BIGboy™ Replacement PVC Float Valve restores automatic water-level control to a BIGboy filtration system. This heavy-duty, non-corrosive PVC unit mounts as a standard bulkhead tank fitting with a 0.48in orifice valve, and its adjustable float lets you set the exact fill level for your reservoir or storage tank.

Once set, it fills unattended and shuts off precisely at the target level — eliminating the risk of overflow and the need for manual monitoring. Built with NSF-approved PVC, 18-8 stainless steel hardware, and Santoprene® rubber replaceable seals for dependable long-term service.

Key Features & Benefits

• Adjustable water level — set the float to your exact desired fill level; the valve shuts off automatically when reached.
• NSF-approved PVC construction — food-safe, non-corrosive material suitable for potable and purified water contact.
• 18-8 stainless steel hardware — corrosion-resistant fasteners for long service life in wet environments.
• Santoprene® rubber seals — replaceable seals maintain a reliable, leak-free shutoff over many fill cycles.
• 0.48in orifice valve, bulkhead tank mount: adequate flow for efficient filling with a standard, clean tank-wall installation.

Who Should Use This

HydroLogic BIGboy system owners who need to replace a worn or damaged float valve and restore automatic fill control to their filtration or storage reservoir.

Compatibility

For: HydroLogic BIGboy systems — Mount: bulkhead tank, 3/4in — Construction: NSF-approved PVC. Replacement seals available separately.

Frequently Asked Questions

Is this a direct replacement for the original BIGboy float valve?

Yes — this is the OEM HydroLogic replacement float valve designed specifically for the BIGboy system. No modifications are needed for installation.

Can I adjust the water level after installation?

Yes — the float arm is adjustable, allowing you to set and reset the shutoff level without removing or replacing the valve. Fine-tune it any time your fill target changes.

When should I replace the Santoprene seals instead of the whole valve?

The seals are field-replaceable, so if the valve is otherwise functioning well but showing a slow drip at the seal, replace just the Santoprene seals rather than the entire assembly. This saves the cost of a full valve replacement.

Can this valve be used with non-BIGboy tanks?

The bulkhead mount design allows installation in any compatible tank wall, provided the cutout matches the valve's fitting size. Verify tank wall thickness and cutout diameter before ordering.