The Rothenberger RP 50-S (MPN 60200) is a heavy-duty manual hydrostatic pressure testing pump built for fast, precise compression and leak testing on pipe systems and pressure vessels up to 60 bar — well beyond domestic-scale pumps like the RP30. A 12 litre DURAMANT-coated steel tank feeds a 45ml-per-stroke piston pump through a steel mesh–reinforced test hose, while a dual-valve (Twin-Valve) mono-block design lets you fine-tune pressure and self-test the pump's own seals without breaking the test circuit. A built-in drag indicator holds the peak pressure reached, making slow leaks easy to spot at a glance. Suited to boiler and pressure-vessel manufacture, solar thermal filling, and commercial heating circuits where the RP30's 30 bar range isn't enough.
Pressure Safety
Never exceed the 60 bar maximum test pressure. Always vent fully via the purge valve (V2) before disconnecting the test hose, and wear eye protection — at 60 bar a failed hose, fitting, or test point releases significantly more stored energy than a domestic-rated pump. Rothenberger's own instructions are explicit that this pump should not be modified or used outside its specified application.
Before You Order
Rothenberger's instruction manual specifies oil or water as the approved test media for this DURAMANT-coated steel-tank version; the broader water/oil/glycol claim on Rothenberger's marketing pages appears to apply specifically to the stainless-steel RP 50-S INOX variant (MPN 60203), which the same manual lists separately as rated for water or glycol mixtures. If you need to test glycol-based heating fluid (e.g. Tyfocor) we'd recommend confirming compatibility with Rothenberger directly, or stepping up to the INOX version, rather than relying on the standard steel tank for that media. Minor variation on the bar-to-psi conversion (840–870psi); Rothenberger's own manual states 860psi, which we've used here. Confirm you have R1/2" BSPT adapters to suit your pipework before ordering.
Typical Use
Where the RP30 covers domestic pipework and underfloor heating, the RP 50-S steps up to commercial heating circuits, boiler and pressure-vessel manufacture, and solar thermal system filling — anywhere a 30 bar pump runs out of range. An optional finely scaled 0–16 bar gauge (0.1 bar resolution, sold separately) extends precision for lower-pressure tests on the same pump.
Why It Works This Way
Dual-Valve Mono-Block Design
Separate shut-off (V1) and purge (V2) valves in a single mono-block body let you fine-tune test pressure and self-test the pump's own seals without disconnecting the test circuit, speeding up repeat tests on site.
DURAMANT-Coated Steel Tank
A galvanized steel tank with DURAMANT coating gives more impact and wear resistance than a plastic tank, built for the heavier-duty, higher-pressure work this pump is rated for.
Polyamide Piston & Aluminium Seal
An abrasion-resistant polyamide piston paired with a combined ball-head valve and one-piece aluminium sealing system cuts down the number of screw connections that can develop slow leaks over years of repeated use.
Drag Indicator
A secondary pointer holds the peak pressure reached, so a slow pressure drop shows as a visible gap on the gauge face — no need to watch the dial continuously through a long test.
45ml Stroke Delivery
Nearly three times the per-stroke volume of a domestic-rated test pump, so the 12 litre tank reaches 60 bar in fewer strokes despite the larger system volumes typical of commercial work.
Steel Mesh–Reinforced Hose
The test hose is wrapped in steel mesh to stop it expanding under pressure, which would otherwise register as a false pressure drop and mask a genuine leak.
Technical Specification
| Product Identification |
| Brand |
Rothenberger |
| Model |
RP 50-S (manual) |
| MPN / Article No. |
60200 |
| Performance |
| Maximum test pressure |
60 bar / 860psi / 6 MPa |
| Delivery per stroke |
0–45ml |
| Valve system |
Dual-valve (Twin-Valve): V1 shut-off, V2 purge |
| Construction & Compatibility |
| Tank capacity |
12 litres |
| Tank material |
Galvanized steel, DURAMANT corrosion-resistant coating |
| Piston |
Polyamide, abrasion-resistant |
| Sealing |
One-piece aluminium sealing system, combined ball-head valve |
| Test hose |
Steel mesh–reinforced |
| Connection |
R1/2" BSPT thread |
| Approved test media |
Oil or water (per Rothenberger instruction manual, steel-tank variant) |
| Pressure readout |
Analogue gauge with drag indicator |
| Optional accessory |
0–16 bar fine-scale gauge, 0.1 bar resolution, with gasket (MPN 61316) — sold separately |
| Physical |
| Maximum working temperature |
50°C / 120°F |
| Dimensions (L × W × H) |
720 × 170 × 260mm |
| Net weight |
8kg |
Frequently Asked Questions
What is the maximum test pressure of the RP 50-S?
60 bar (860psi / 6 MPa), confirmed in Rothenberger's own instruction manual for this model.
What test media is the RP 50-S rated for?
Rothenberger's instruction manual specifies oil or water for this DURAMANT-coated steel-tank version. Glycol-based fluids (such as Tyfocor) appear to be specified for the stainless-steel RP 50-S INOX variant instead — check with Rothenberger before using glycol mixtures in the standard steel-tank pump.
How does the dual-valve (Twin-Valve) system work?
Valve V1 isolates the test circuit while filling; valve V2 is a purge valve used for fine pressure adjustment and to self-test the pump's seals. This mono-block design lets you fine-tune and re-test without disconnecting the hose from the system under test.
What's the difference between the RP 50-S and RP 50-S INOX?
Both share the same 60 bar / 12L / 45ml-stroke performance and R1/2" BSPT connection. The standard RP 50-S (60200) has a DURAMANT-coated galvanized steel tank rated for oil or water and weighs 8kg; the RP 50-S INOX (60203) has a stainless-steel tank rated for water or glycol mixtures and weighs slightly more at 8.4kg.
Can I get a more precise gauge for lower-pressure tests?
Yes — Rothenberger offers an optional finely scaled 0–16 bar pressure gauge (0.1 bar resolution, MPN 61316) that fits the RP 50-S for more precise readings on lower-pressure test work, sold separately.
How does the RP 50-S compare to the RP30?
The RP30 is a lighter, domestic-focused pump: 30 bar maximum, 4.5L tank, 16ml per stroke, single-valve operation. The RP 50-S doubles the pressure range to 60 bar with a larger 12L tank, 45ml-per-stroke delivery, and a dual-valve system, suited to commercial heating circuits, boiler and vessel manufacture, and solar thermal filling.
