Bristan Onza Rear-Fed Exposed Black Thermostatic Shower Valve with Riser Kit (837AJ)
The Bristan Onza rear-fed exposed thermostatic shower valve in black provides steady performance for high-pressure water systems. It delivers 7.6L/min at 1 bar through a single-spray round handset and maintains stable temperatures with thermostatic control and automatic water failure shutdown. Sequential control offers straightforward adjustment, while the 95mm shower head and riser rail give practical positioning for everyday use. The unit operates between 1 and 5 bar, with a maximum temperature of 60°C, supporting reliable hot-water management in modern bathrooms. A rub-clean nozzle design helps reduce limescale build-up, and the easy-fit system supports efficient installation. Designed to complement square and round bathroom fittings.
- Suitable for High Pressure Water Systems Only
- Delivers 7.6Ltr/min at 1bar
- Sequential Control
- 1 Year Guarantee
- Thermostatic Temperature Control
- Riser Rail
- Single-Spray Pattern Shower Head
- Family Safe
- EasyFit Installation
- Rub-Clean Nozzles
View all: Bristan Showers
The Bristan Onza rear-fed exposed thermostatic shower valve in black provides steady performance for high-pressure water systems. It delivers 7.6L/min at 1 bar through a single-spray round handset and maintains stable temperatures with thermostatic control and automatic water failure shutdown. Sequential control offers straightforward adjustment, while the 95mm shower head and riser rail give practical positioning for everyday use. The unit operates between 1 and 5 bar, with a maximum temperature of 60°C, supporting reliable hot-water management in modern bathrooms. A rub-clean nozzle design helps reduce limescale build-up, and the easy-fit system supports efficient installation. Designed to complement square and round bathroom fittings.
- Suitable for High Pressure Water Systems Only
- Delivers 7.6Ltr/min at 1bar
- Sequential Control
- 1 Year Guarantee
- Thermostatic Temperature Control
- Riser Rail
- Single-Spray Pattern Shower Head
- Family Safe
- EasyFit Installation
- Rub-Clean Nozzles
View all: Bristan Showers
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| Specification | |
|---|---|
| Brand | Bristan |
| Built In Valve/Exposed | Exposed |
| Colour | Black |
| Fixings Supplied | Fixings Supplied |
| Manufacturer Guarantee | 1 Year Guarantee |
| Max Water Temperature | 60 °C |
| Max. Shower Flow Rate | 8.8 Ltr/min |
| Maximum Bar Pressure | 5 bar |
| Min. Shower Flow Rate | 7.6 Ltr/min |
| Minimum Bar Pressure | 1 bar |
| Mixer Type | Thermostatic |
| Model Name | Onza |
| Model No | NZA SHXAR BLK |
| No. of Outlets | Single Outlet |
| Pack Size | 1 |
| Parent Colour | Black |
| Pieces in Pack/Case | 1 |
| Pipe Centres Size/Range | 110-155 mm |
| Product Depth | 90 mm |
| Product Height | 650 mm |
| Product Type | Shower Valve with Riser Kit |
| Product Width | 175 mm |
| Shower Head Shape | Round |
| Shower Head Size | 95 mm |
| Shower Product Type | Mixer |
| Smart Compatibility | Not Smart |
| Temperature Control Type | Thermostatic Temperature Control |
| Total Product Weight | 2.55 kg |
| Water Failure Shutdown | Automatic Water Failure Shutdown |
| z1 - UK Manufacturer Name | Bristan Group Ltd |
| z2 - UK Manufacturer Postal Address | Birch Coppice Business Park, Dordon, Tamworth, B78 1SG |
| z3 - UK Manufacturer Electronic Address | enquire@bristan.com |
| z4 - EU Manufacturer Name | Masco Europe S.a.r.l. |
| z5 - EU Manufacturer Postal Address | 14 Rue Strachen, Mensdorf, 6933, Luxembourg |
| z6 - EU Manufacturer Electronic Address | enquire@bristan.com |
Product Contents
Shower valve, plated elbows (2), handset, riser rail with brackets, hose retainer, plated shrouds (2), black filters (2), 1.5m hose and fixings.
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