The Salmson SB 04-15 (also known as SB04-15) is no longer manufactured. The current replacement is the Wilo Star-Z NOVA — a direct swap for the SB 04-15 and its predecessor, the Salmson NSB 04-15.
The Wilo Star-Z NOVA is supplied as Rheem spare part number 299997 and is compatible with a wide range of Australian solar hot water systems including Rheem, Dux, Hills, Rinnai, Chromagen, Apricus, Bradford Solar, Solahart, Conergy, Edson, Endless Solar, StratCo and more.
This pump suits both flat plate and evacuated tube open loop solar hot water systems.
Brass pump housing, Noryl impeller, ceramic shaft. Power consumption just 3–5 watts. Port-to-port length 84 mm, Rp ½ threaded connections.
Replacement impeller cartridges are still available for the SB 04-15, NSB 04-15 and Wilo Z 15 A — the cartridge is identical across all three models. However, given the age of most systems still running these pumps, replacing the complete pump is usually the better option.
Trusted replacement used across thousands of Australian solar hot water systems.
The Salmson SB 04-15 is no longer manufactured and has been replaced by the Wilo Star Z Nova. In most cases, replacing the full pump is more reliable than replacing internal components.
What is the difference between Salmson and Wilo pumps?
Salmson pumps are the older models that were widely used in solar hot water systems. These have now been discontinued and replaced by Wilo pumps, which are the updated versions offering improved efficiency, reliability and modern design.
The Wilo Star Z Nova is one of the most commonly used solar hot water circulation pump replacements in Australia.
Yes, the Salmson SB 04-15 pump has been discontinued and is no longer manufactured. Orders placed for this product will be supplied with the Wilo Star Z Nova replacement pump.
The Salmson SB 04-15 is typically replaced by the Wilo Star Z Nova solar hot water pump. This is a modern, energy-efficient circulating pump designed to suit most systems that previously used the Salmson model. In most cases, the Wilo Star Z Nova is the recommended upgrade for reliability and long-term performance.
In some cases, the internal cartridge (pump motor) can be replaced instead of the full pump. However, due to the age of the Salmson SB 04-15 and the fact that it has been discontinued, replacing the entire pump is often the better long-term solution. A full replacement ensures improved efficiency, reliability, and compatibility with current systems.
It is recommended that a licensed plumber or qualified technician installs the pump, especially if you are not familiar with solar hot water systems. Installation involves working with water lines and electrical components, so professional installation helps ensure the system operates safely and correctly.
What will I receive if I order this pump?
You will receive a Wilo Star Z Nova pump, which is the recommended replacement for the Salmson SB 04-15 and is suitable for most systems that used this model.
Pump for pipe installation, blocking-current proof synchronous motor with high starting torque. Brass pump housing, Noryl impeller, ceramic shaft.
Power consumption of 3 – 5 W.
Equipped with thermal insulation shell as standard, housing thread Rp ½.
| Hydraulic data | |
|---|---|
| Maximum operating pressure PN | 10 bar |
| Delivery head for Qmin H Qmin | 1.0 m |
| Max. volume flow Qmax | 0.4 m³/h |
| Min. fluid temperature Tmin | 2 °C |
| Max. fluid temperature Tmax | 95 °C |
| Min. ambient temperature Tmin | 2 °C |
| Max. ambient temperature Tmax | 40 °C |
| Max. permitted total water hardness | 3.57 mmol/l (20°dH) |
| Motor data | |
|---|---|
| Mains connection | 1~230 V, 50 Hz |
| Rated power P2 | 5 W |
| Rated current IN | 0.05 A |
| Max. speed nmax | 3000 1/min |
| Power consumption P1 min | 3 W |
| Power consumption P1 max | 5 W |
| Interference emission | EN 61000-6-3 |
| Interference immunity | EN 61000-6-2 |
| Protection class motor | IP42 |
| Insulation class | F |
| Threaded cable connection | 1 x PG11 |
| Motor protection | no |
| Materials | |
|---|---|
| Pump housing | Brass |
| Impeller | PPE/PS-GF30 |
| Shaft | Ceramic |
| Bearing | Carbon, synthetic resin-impregnated |
| Installation dimensions | |
|---|---|
| Thread | G 1 |
| Pipe connection on the suction side DNs | Rp ½ |
| Pipe connection on the discharge side DNd | Rp ½ |
| Port-to-port length L0 | 84 mm |
| Installation dimensions | |
|---|---|
| Thread | G 1 |
| Pipe connection on the suction side DNs | Rp ½ |
| Pipe connection on the discharge side DNd | Rp ½ |
| Port-to-port length L0 | 84 mm |
| Fluid media | Water 100 % |
| Fluid temperature T | 20.00 °C |
| speed at duty point n hydr. @ OP | 2900 1/min |
Solar Hot Water Manufacturers
This product is required to be installed by a licensed trades person as per applicable legislation, and be clear that failure to do so breaches manufacturer’s warranty and may result in injury and/or death, may jeopardise applicable insurance policies or may be in breach of the relevant law. Solar Hot Water Parts recommend that Buyers check with their local authorities in regards to any specific regulations regarding licensing requirements for Plumbing or Electrical work.
Further information for Plumbing & Electrical licensing is available at:
| State or Territory | Plumbing Licensing Information | Electrical Licensing Information |
|---|---|---|
| NSW | www.fairtrading.nsw.gov.au | www.fairtrading.nsw.gov.au |
| ACT | www.actpla.act.gov.au | www.actpla.act.gov.au |
| QLD | www.qbcc.qld.gov.au | www.worksafe.qld.gov.au |
| VIC | www.vba.vic.gov.au/ | www.esv.vic.gov.au |
| WA | www.commerce.wa.gov.au | www.commerce.wa.gov.au |
| SA | www.sa.gov.au | www.sa.gov.au |
| NT | www.plumberslicensing.nt.gov.au | www.nt.gov.au |
| TAS | www.justice.tas.gov.au | www.justice.tas.gov.au |
