Slayer · 2 and 3 group
Slayer Steam EP — PSSR examination & servicing
Steam EP machines are used in specialty cafés and roastery bars across London and the UK nationwide. The engineer carries out the statutory PSSR examination, the front-end service and the water treatment on this model — a standalone examination is £295 + VAT, or £500 + VAT with the service included.
Quick answer
Does a Slayer Steam EP need a PSSR examination?
Yes, if it operates in a workplace. It carries a single steam boiler with its own protective devices, which is the pressure system in scope. Steam is a relevant fluid under PSSR 2000 and steam systems are covered at any pressure and any volume, so the boiler must have a Written Scheme of Examination and be examined periodically by a competent person.
- Examination only
- £295
- With service
- £500
The machine
Why the Steam EP matters to the Slayer owner
The volumetric Slayer platform — needle-valve pre-infusion and independent brew and steam tanks, widely used across UK specialty coffee.
In practice you will find it in specialty cafés and roastery bars across London and the UK — which shapes what the examination looks like on site: how the machine is accessed, how long it can be offline, and how much scale it has accumulated.
On the day
- The steam boiler is drained and inspected internally with an endoscope for scale, corrosion and weld condition.
- The safety valve, anti-vac valve and fittings are checked and tested.
- The pressure gauge is verified against our calibrated test gauge, not against itself.
- A 3 group boiler holds more water than a 2 group, so the drain, refill and heat-up all take longer — allow the full appointment window.
- The Written Scheme of Examination names the vessel and the protective devices it covers.
Typical rates for this model
- Standalone PSSR examination
- £295
- Service + PSSR bundle
- £500
- Certified safety valve, if it fails
- Quoted per machine
- Water filter, fitted on a visit
- from £107
- Grinder calibration & deep clean
- £89
- If it does not pass
- Explained in writing
All prices exclude VAT. The additional drain and heat-up time a 3 group boiler needs. We confirm the exact figure on the call.
Filters are fitted on site by an engineer and are not posted out. The filter price applies when ordered with a PSSR examination, service, call-out or water test; booked alone it is charged at the standard call-out.
What we see on this model
- The steam boiler and its protective devices are what fall inside the scheme. Slayer's build quality shows up in the fittings, which usually outlast the seals.
- 1.7 L brew tank per group and 7.4 L (2gr) / 12 L (3gr) steam tank; 100 kg / 139 kg; 4.7-5.6 kW single phase (2gr). Volumetric push-button with programmable 0-4 s pre-wet and pause; steam wands use electronic valves that Slayer states do not need rebuilding like mechanical valves. Slayer does not publish individual part numbers in the Steam EP manual.
Verified boiler data
What is actually inside this machine
| Configuration | Steam boiler |
|---|---|
| 2 group | 7.4 L |
Manufacturer's published boiler capacities. Where a maker publishes no figure we say so rather than estimate.
Service interval. Slayer: order a PM kit every 12-18 months under heavy commercial use; the machine's own PM countdown can be set to 12, 6 or 3 months to match volume.
Fault finder
What actually goes wrong on a Slayer Steam EP
Owners usually call us with a symptom, not a diagnosis. This is what that symptom most often turns out to be on this machine, and what putting it right involves.
| Symptom | Usual cause | What fixes it |
|---|---|---|
| Steady drip from the hot-water spout when idle | scale or debris on the mix-valve plunger or inside the valve stem and ports | try adjusting the mix-valve blending knob first (Slayer says this often resolves the drip), otherwise strip the 24 VDC mix valve and clean the plunger/stem/ports or replace 99015-10070. |
| Volumetric doses stop registering - on the Steam EP the on-screen group timers keep climbing and the shot only stops when the barista stops it manually | Slayer 'Known Issue': the flowmeter signal receptor still lights up but pulses are not reaching the board because the terminal boot connections on the flowmeter spades work loose, affects Steam Series in volumetric mode | remove the boot from the flowmeter spades, unscrew the boot housing, press the three terminal connectors firmly together, refit and retest. |
| Barista display gets progressively dimmer until unreadable | OLED pixel fade - an acknowledged Slayer known issue, and OLEDs cannot be repaired | replace the OLED display assembly 30005-60110, current firmware (Steam EP 1.10+) adds a Display Off feature after 1-60 min to extend pixel life. |
| Steam wand leaks at the tip or rotating base, becomes stiff, or flops and will not stay put | worn steam-valve rubber seals, o-rings and Teflon bushing at the ball joint, conversely lubricant introduced into the ball joint makes the wand drop | steam-wand rebuild is on the EP 6-month (evaluate/rebuild) and 12-month (rebuild) PM: seat gasket, Teflon bushing, bushing o-ring, valve-nut o-ring. Assemble the ball joint with WATER ONLY. |
| Machine alarms and stops heating, display shows an up-arrow STM or STM AL2 | up-arrow STM = steam fill timeout after four minutes (usually water supply/path), STM AL2 = transducer over-pressure from an overfilled steam tank, an obstruction in the autofill solenoid, or a runaway SSR overheating the steam tank | check water path for the fill timeout, for STM AL2 check fill level, clean/test the autofill solenoid, test the SSR. |
| Steam solenoid fires when the actuator is off, or fails to fire when moved | the magnetic barrel switch is threaded in and adjustable - set too far in or out it mis-reads the actuator magnet, if adjustment fails the switch has failed | thread in (clockwise) if it engages when off, out (anticlockwise) if it does not engage, otherwise test continuity (N/C shows continuity only with magnet absent) and replace. |
| Steam pressure low or the plume stalls halfway through a pitcher. | Cool-touch steam tip clogs are the most common cause across Slayer models; worn solenoid or mineral restriction in the steam line follow. | Clean/descale the tip first, then test the steam solenoid and the steam line. |
| Brew tank temperature becomes unstable. | PID sensor fault or a corroded solid-state relay; the brew tank itself rarely fails. | Restart and recalibrate; if drift persists past 30 minutes replace the sensor or the SSR. |
| Rotary pump gets noisy at 3-4 years. | Vane wear, accelerated by hard water. | Replace the pump before it seizes. |
| Leak round the portafilter and loss of group pressure. | Group gasket and shower screen wear (same group hardware as the V3). | Replace screen and gasket at the PM; Slayer PM kits are specified every 12-18 months. |
These are faults documented for this model, not a generic list.
Common parts
Common parts for the Slayer Steam EP
The components most often replaced on this machine, listed by reference number, as a reference for engineers and owners identifying a part.
| Part no. | Description |
|---|---|
| #0716 | Steam Tube Anti Scorch Rubber Sleeve 10mm |
| #15910 | O Ring 12.29 X 8.73 - Nitrile (Turbo Steam Top) |
| #24735 | Anti Scorch Rubber Sleeve For 8mm Steam Tube - Original |
| #2102 | Parker 3 Way Grp Solenoid Valve 24v (Plus 3 housings in) |
| #2841 | Element Protection Thermostat - Original |
| #0398 | Lucifer 3 Way Grp Solenoid Valve 230v (Ruby) |
| #18281 | Parker 3 Way Solenoid Valve 24v |
| #0450 | PARKER 3 WAY GRP SOLENOID VALVE 230V (RUBY) |
| #23371 | PARKER 2 WAY INLET SOLENOID VALVE 230V |
| #29950 | PARKER 3 WAY SOLENOID VALVE 24V |
| #0020 | Pump Head Rotoflow |
| #0093 | Sirai Pressure Switch |
Parts most often needed on this model
| Part | Number | What it fixes |
|---|---|---|
| Shower screen and dispersion screw | — | Per-group wear item; order with the 12-18-month PM kit. |
| Portafilter gasket | — | Hardens and leaks; in the PM kit. |
| Pre-wet / brew valve seals | — | Electronic steam valves need no rebuild, but brew-side seals still wear. |
| Steam wand tip | — | Clogs faster than any other part; keep spares. |
Questions
Steam EP questions, answered
How a boiler of this size is examined, how often, and who carries the duty — see the complete PSSR guide.
0208 037 9340
How much does a PSSR examination cost on a Slayer Steam EP?
A standalone examination is £295 + VAT, because the additional drain and heat-up time a 3 group boiler needs. Combined with a front-end service it is £500 + VAT, which is what most specialty cafés and roastery bars across London and the UK choose, since the boiler has to be drained for the examination either way. We confirm the exact figure on the call.
How often does a Slayer Steam EP need examining?
The Written Scheme of Examination sets the interval, and for a commercial machine used in specialty cafés and roastery bars across London and the UK it is typically 12 to 14 months. A 3 group boiler holds a larger volume of water, so scale accumulates faster than in a smaller machine on the same duty and the scheme usually sets the shorter interval.
How long does a Slayer Steam EP examination take, and what happens on the day?
A 3 group boiler holds more water than a 2 group, so the drain, refill and heat-up all take longer — allow the full appointment window. The visit runs: the steam boiler is drained and inspected internally with an endoscope for scale, corrosion and weld condition. the safety valve, anti-vac valve and fittings are checked and tested. The gauge is then verified against our calibrated test gauge, the system is pressure tested and held, and the machine is re-assembled, refilled, heated and function tested. The Written Scheme of Examination, signed report and asset record follow within 48 hours.
Other Slayer machines covered
Call and we'll price your Steam EP on the spot.
Same-week appointments nationwide, the Written Scheme of Examination issued within 48 hours of the visit, and a fixed price agreed before we travel.