This kit contains everything needed to replace the circulating pump in a Dux, Hills or Conergy open loop solar hot water system in one order:
Replaces the Salmson SB 04-15 and NSB 04-15 The Salmson SB 04-15 (also known as SB04-15) and its predecessor the NSB 04-15 are no longer manufactured. The Wilo Star-Z NOVA is the current direct replacement — also supplied as Rheem spare part number 299997 and compatible with Wilo Z 15 A installations. Brass pump housing, Noryl impeller, ceramic shaft. Power consumption 3–5 watts.
Why replace the non-return valve at the same time? An aged non-return valve that allows reverse flow is one of the most common causes of premature pump failure. This valve is solar-rated for high-temperature open loop applications. Standard non-return valves are not suitable for solar hot water systems.
Suits Dux, Hills and Conergy open loop solar hot water systems including flat plate and evacuated tube configurations.
Trusted replacement used across thousands of Australian solar hot water systems.
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 Wilo Star Z Nova is widely used as a replacement for the discontinued Salmson SB 04-15 and earlier models. It is suitable for most systems that previously used these pumps.
The Wilo Star Z Nova is compatible with many Australian solar hot water systems including Rheem, Dux, Apricus, Hills and Solahart. If unsure, contact us to confirm suitability.
In most cases, replacing the entire pump is more reliable than replacing internal components, especially for older or discontinued models.
Installation by a licensed plumber or qualified technician is recommended to ensure safe and correct operation.
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 |
