How to Identify Your Caroma or Fowler Toilet

The Universal Replacement: The Quietflow M5 is Caroma’s most advanced mechanical outlet valve. It is a direct “drop-in” replacement for many older Caroma systems.

• Backward Compatible: Successfully replaces the discontinued M3 and M4 outlet valves.

• The Identification: Look for the signature grey and white tower with the adjustable float. This is a dual-flush mechanical valve.

• The Diagnostic: If your Caroma toilet is leaking into the bowl, or the flush feels “sticky” and won’t reset, the M5 is the definitive fix.

Genuine Caroma Factory Spare — 750085 The M5 Quietflow earned its name by being one of the most silent-sealing valves on the market. It features a heavy-duty silicone seal and an adjustable flushing volume to ensure it works perfectly with both older 6/3L and modern 4.5/3L cisterns.

Why the M5 is the Plumber’s Choice:

• Simple Height Adjustment: The telescopic design allows it to fit a wide variety of Caroma cistern heights.

• Dual Flush Precision: Separate adjustments for full and half flush volumes to save water.

• Reliability: Built to withstand Australian water conditions, including areas with high mineral content that usually perish cheaper valves.

Complete Your Repair: If your cistern is also taking a long time to fill or making a whistling sound, we recommend pairing this with the Caroma Quietflow Inlet Valve for a complete internal overhaul. If your toilet is bottom inlet, meaning the inlet hose is exposed outside of the toilet, you should buy the Geberit Inlet Valve

Fastest Dispatch in Sydney

A leaking toilet is an emergency. We keep the Caroma M5 in high stock at our Mascot warehouse for rapid fulfillment:

• 8 out of 10 orders delivered on or before the estimated time.

• Less than 24-hour handling: We dispatch most orders the same business day.

• Sydney Local? Order online and organize your own Uber pickup from our Mascot location for an immediate repair.

• Q: Will this replace my old blue or green Caroma valve?

  • A: Yes. The M5 is designed to be the universal successor to most older Caroma mechanical outlet valves.

• Q: Do I need to remove the cistern to install this?

  • A: In most modern Caroma cisterns, the “tower” clips into a base. If your base is in good condition, you can often clip the new M5 tower straight in. If the base is leaking, you will need to remove the cistern to replace the entire unit.

• Q: Is the seal replaceable?

  • A: Yes, but if the plastic mechanism is over 5-7 years old, we recommend replacing the whole 750085 unit to ensure the spring tension and float are also refreshed.

If you are unsure of your cistern, please send us a photo to sales@sydneybathroomware.com.au. It commonly matches with the related button below. You can also view our how to identify our caroma spare parts guide to identify your spare part

The Caroma Quietflow 2 Back Entry Inlet Valve Kit (687257) is a genuine replacement part designed for Caroma toilet cisterns with a rear water inlet connection. This kit is commonly required when converting a cistern to the Quietflow M5 outlet valve, as the inlet valve must include the correct clip system to attach securely to the outlet valve assembly.

The kit includes a replacement inlet valve and flexible hose, allowing you to replace older hard pipe connections and restore reliable cistern filling performance.

Features

• Genuine Caroma Quietflow 2 inlet valve kit

• Designed for back entry toilet cisterns

• Required when upgrading to Quietflow M5 outlet valve

• Includes flexible inlet hose to replace old hard pipe connection

• Secure circular clip system for outlet valve mounting

• Suitable for many Caroma and Fowler cisterns

If your unsure see our Complete Caroma Spare Parts Guide to identify your toilet

⚡ SMART REPLACEMENT ALERT

The Caroma Quietflow (687042) is manufactured by Geberit.

We recommend purchasing the Geberit Impuls 360 Bottom Entry Valve. It is the exact same part, from the same factory, at a more competitive price.

• 100% Guaranteed Fit

• Genuine Geberit Quality

• In Stock for Immediate Dispatch

Caroma Quietflow Inlet Valve (Part No. 687042)

The Caroma Quietflow 687042 is one of the most widely used bottom-entry inlet valves in Australia, found in thousands of Caroma, Fowler, and Stylus cisterns.

Technical Cross-Compatibility

It is important to note that Geberit is the original equipment manufacturer (OEM) for this specific Caroma valve. Because we are a specialist Geberit dealer, we suggest our customers purchase the Geberit Impuls 360.

Why switch to the Geberit branded version?

• Direct Manufacturer Pricing: By removing the “Caroma” branding, we can offer the same high-performance valve at a better price point.

• Easier Maintenance: The Geberit 360 is the latest iteration of this design, featuring improved resistance to harsh Australian water conditions.

• Same 1/2″ Connection: It is a 1:1 physical swap. No plumbing modifications are required.

Reliability & Shipping

Whether you choose the Caroma-branded or Geberit-branded valve, you benefit from the Sydney Tap & Bathroomware service standard:

• 8/10 Orders Delivered Early: We prioritize toilet repair parts to get your bathroom back online.

• Under 24-Hour Handling: Fast dispatch from our Sydney warehouse.

• Mascot Showroom Pickup: Available if you need to fix your toilet today.