Philmac Cistern Valve
Philmac’s cistern valve uses a tried and tested design that ensures a slow and controlled opening and closing to avoid water hammer. Combined with a quiet operation, it makes them ideally suited for applications such as evaporative air conditioners.


CISTERN VALVE
| Product Number | Size |
|---|---|
| 91 1527 00 | 1/2” Parallel |
CISTERN VALVE Spare Part-Back Nut
| Product Number | Size |
|---|---|
| 40 3116 01 | BACKNUT |
CISTERN VALVE Spare Part-Lever
| Product Number | Size |
|---|---|
| 40 3173 02 | PIVOT PIN – BRASS |
CISTERN VALVE Spare Part-Pivot Pin
| Product Number | Size |
|---|---|
| 41 1527 01 | 255 mm (Includes pivot pin) |
CISTERN VALVE Spare Part-Plunger Assembly
| Product Number | Size |
|---|---|
| 40 3001 05 | PLUNGER ASSEMBLY – PLASTIC – Consists of plunger complete with seal and O-ring |
CISTERN VALVE Spare Part-Seat Seal
| Product Number | Size |
|---|---|
| 40 3101 07 | SEAT SEAL – NITRILE |
CISTERN VALVE Spare Part-Stem Sleeve
| Product Number | Size |
|---|---|
| 40 3101 19 | STEM SLEEVE |
Overview / Why Choose This Product
The Philmac Cistern Valve is a compact, float‑controlled valve engineered to maintain consistent water level while preventing water hammer. Its slow, controlled opening and closing—combined with a built‑in reservoir tube (baffle)—delivers quiet operation and confidence in tight installations like toilet cisterns and evaporative air conditioners. BSP threads ensure easy compatibility across plumbing systems, and the robust thermoplastic construction offers long‑term corrosion resistance. Australian Made design and testing underpin reliability in local conditions.
Key Features
Slow-fill, soft-close action – reduces water hammer and noise
Quiet operation – internal baffle design for silent filling
Compact design – ideal for tight cistern spaces
Easy maintenance – quick access to seals without removing the valve
Applications & Benefits
Applications
- Toilet cisterns
- Evaporative air conditioners
- Small tanks and reservoirs
Benefits
- Consistent water levels – reduces manual monitoring
- Quiet performance – improves user experience
- Long service life – corrosion-resistant materials
Technical Specifications
- Size Range: Commonly ½” BSP inlet
- Connection Type: BSP threaded ends
- Operation: Slow-fill and soft-close for water hammer protection
- Material: Thermoplastic body with NBR seals
Note: Always confirm size, pressure class, and compliance requirements against the official datasheet and local standards.
Installation Guide
- Attach valve to cistern inlet using BSP threaded connection.
- Connect float arm and adjust position for desired water level.
- Pressurise and test the system for correct operation.
- Fine-tune settings for optimal performance.
For detailed diagrams and adjustment tips, view the Philmac installation guide online.
FAQs
What is this valve used for?
It’s designed for water level control evaporative coolers, and small tanks.
What sizes are available?
Common inlet size is ½” BSP. Check SKU for variations.
Do I need special tools for installation?
No. Installation is simple with standard plumbing tools.
What makes this valve different?
Its slow-fill, soft-close design prevents water hammer and ensures quiet operation in compact spaces.



