Item Description
Grohe PIO EAU2 Old Style Button — 42357 — For 42774 Flush Valve
Genuine Grohe Pneumatic Button Dual Flush Old Style EAU2 Twin-Pipe Valve
Replacement Grohe pneumatic dual flush button for the classic 42774 Old Style EAU2 twin-pipe valve. Retro design, easy to install, and perfect for bringing your old-school flush setup back to life.
Compatibility: Designed exclusively for the 42774 Old Style EAU2 twin-pipe pneumatic flush valve. ⚠️ Not suitable for cable-operated or newer single-pipe EAU2 valves.
Key features
- Replacement pneumatic push button for Old Style EAU2 systems
- Dual flush — small & large flush options
- For the classic twin-pipe Grohe EAU2 valve
- Direct replacement for 42774 valve buttons
- Simple push-fit air tube connection
- Genuine Grohe part (42357)
Size & format
- Part number: 42357
- Button type: Dual flush pneumatic
- Valve compatibility: 42774 Old Style EAU2 twin-pipe
- Operation: Air-operated
What’s included
- 1 × Grohe PIO EAU2 Old Style Button — 42357
Flush valve and air tubes are not included — button only.
Check before you buy
- Your system uses the 42774 Old Style EAU2 twin-pipe valve
- You are replacing a round dual-flush button
FAQs
Will this fit newer EAU2 valves?
No — this is only compatible with the 42774 Old Style EAU2 twin-pipe valve.
Does it include the flush valve?
No — this listing is for the button only.
Can you help identify my button?
Yes — send photos via WhatsApp 07359 625424 or email [email protected] and we’ll confirm it for you.
Need help figuring out if this product is right for your setup?
Send us your best bathroom selfies (or, you know, just your bathroom setup pics) to [email protected] or WhatsApp 07359 625424 us, and we'll help you flush your confusion away!