Plastic non corrosive.
All valves labelled.
No excessive leaking.
Direction of flow indicated.
Drainage - Adequate drain gutters and sump it to clear any leaked/spilled water.
Lighting - Minimum 300 lux (15 watts/sqm).
Ventilation - Mechanically ventilated with a minimum 2 air changes per hour.
Access - Safe means of access for Engineering TMs.
Unauthorised Access - Self locking door with adequate safety signage.
Floor - reasonable condition.
Walls - reasonable condition.
Plastic, self priming with integral filter basket.