Grohe Dal AV2 Single Hose Outlet Valve

The Grohe DAL AV2 Single Hose Outlet Valve (SKU 42320) is the correct replacement part for concealed Grohe DAL cisterns fitted with a single hose outlet configuration.

This outlet valve should be replaced when your cistern button fails to operate correctly, or when water continues running into the toilet bowl after flushing — a common symptom of a worn or failed AV2 valve seat or seal. Unlike dual-hose variants, the AV2 single hose outlet valve is designed for single-flush pneumatic push-button Grohe DAL systems.

When does the AV2 outlet valve need replacing?

• The toilet continues to run or trickle after flushing
• The flush button feels unresponsive or requires multiple presses
• Water leaks internally into the pan between flushes
• You have already replaced the outlet valve cartridge but the problem persists

Not sure if this is the right part? The AV2 is the single-hose version — if your cistern has two hoses connecting to the outlet valve, you’ll need the Grohe DAL Dual Hose Cistern Outlet Valve instead. Take a photo of your existing valve and email it to sales@sydneybathroomware.wp.top4.website and our team will confirm compatibility before you order.

Sydney Bathroomware stocks genuine Grohe DAL spare parts and ships Australia-wide. You can also visit our showroom at 1263 Botany Road, Mascot NSW (Monday–Friday, 8:00am–4:00pm) to speak with our parts team in person.

Q: How do I know if my Grohe DAL outlet valve needs replacing?

The most common signs are water continuously running into the toilet bowl after flushing, or a flush button that is unresponsive or requires repeated pressing. If replacing the outlet valve cartridge does not fix the issue, the full AV2 outlet valve assembly is likely the cause.

Q: What is the difference between the Grohe DAL AV2 single hose and dual hose outlet valves?

The AV2 single hose valve has one hose connection and is used in single-flush pneumatic Grohe DAL cisterns. The dual hose variant (also available from Sydney Bathroomware) is used in cisterns with a two-button dual-flush configuration. Check your existing valve before ordering — if it has two hoses, you need the dual hose version.