- HEP Plumbing
- Reverse-osmosis Rigs

Reverse-osmosis Rigs
Reverse-osmosis Rigs | Water Purification | Plumbing | Bristol
Enjoy crystal-clear drinking water straight from the tap with HEPâs reverse-osmosis rigs, expertly plumbed for homes and businesses across Bristol. Our compact systems strip away up to 99% of dissolved solids, chlorine, and micro-contaminants, leaving every glass tasting fresh and pure. From the moment our engineers arrive, youâll see why weâre trusted to turn complex filtration tech into an everyday luxuryâseamless installation, tidy workmanship, and guidance that makes maintenance effortless.
Whether youâre safeguarding your familyâs health, protecting espresso machines from scale, or elevating the flavour profiles in a commercial kitchen, our tailored solutions make water purification simple. We source premium membranes, use WRAS-approved fittings, and fine-tune each rig to Bristolâs variable mains supply, so you get optimum flow without waste. Tap into HEPâs know-how today and discover how clean water can transform routine into remarkable.
FAQs
What is reverse osmosis and how does it purify water?
Reverse osmosis (RO) is a pressure-driven filtration process that forces tap water through a semi-permeable membrane whose microscopic pores (â0.0001 Âľm) allow only water molecules to pass. Dissolved salts, heavy metals, fluoride, nitrates, pesticides, micro-plastics and most microorganisms are rejected and flushed to drain, leaving highly purified permeate water on the clean side. Because RO works at the ionic level, it delivers far higher purity than standard carbon or sediment filters and is widely used in laboratories, food production, aquatics and domestic drinking stations.
Why do I need a qualified plumber to install a reverse-osmosis rig?
An RO system integrates mains plumbing, high-pressure lines, drain connections, storage tanks and (often) remineralisation cartridges. A qualified Bristol plumber ensures: ⢠correct mains isolation and pressure regulation so the membrane is neither starved nor over-pressurised; ⢠WRAS-approved fittings to comply with UK water bylaws; ⢠air-gap or self-piercing drain saddles that prevent cross-contamination; ⢠secure, leak-free mounting of pre-filters, pumps and gauges. Professional installation protects your property from leaks, validates manufacturer warranties and guarantees the unit performs to its specified rejection rates.
How often do RO membranes and filters need replacing under Bristolâs water conditions?
Bristolâs municipal supply is moderately hard (â250 mg/L CaCOâ) and has seasonal organic loading from the Mendip catchments. Typical maintenance intervals are: ⢠Sediment pre-filter: 6 months (captures silt/scale, preventing membrane fouling). ⢠Carbon block: 6 â 12 months (removes chlorine/chloramine, which damage membranes). ⢠RO membrane: 24 â 36 months, provided incoming chlorine is fully removed and total dissolved solids remain <500 ppm. ⢠Post-carbon or remineralisation cartridge: 12 months. Fitting an inexpensive inline TDS meter lets you spot rising permeate valuesâan early sign the membrane is reaching end-of-life.
Will a reverse-osmosis system remove limescale and PFAS from Bristol tap water?
Yes. Limescale is caused by dissolved calcium and magnesium ions that are 95â99 % rejected by RO membranes, so scale cannot form in kettles or coffee machines. Per- and polyfluoroalkyl substances (PFAS), sometimes called âforever chemicalsâ, are also effectively removed; studies show thin-film composite RO membranes achieve >90â99 % rejection of common PFAS species. Pairing the membrane with a high-capacity carbon pre-filter further adsorbs residual PFAS and volatile organics, giving a robust multi-barrier defence.
How much wastewater does an RO rig produce and can it be reduced?
Standard residential RO units operate at a 3:1 or 4:1 waste-to-pure ratio, meaning three to four litres are sent to drain for every litre of product water. Options to improve efficiency include: ⢠Permeate-pump or electric-pump boosters that raise membrane pressure and cut the ratio to about 2:1. ⢠âZero-wasteâ recirculation kits that redirect concentrate to a grey-water tank for toilet flushing or gardening. ⢠Commercial low-energy membranes rated for 1:1 performance. Bristol Waterâs mains pressure averages 2.5â3 bar; adding a booster to reach 5.5 bar typically halves wastewater output.
What maintenance and support services do you provide for RO systems in Bristol?
We offer one-off call-outs, annual service contracts and bespoke commercial support: ⢠Domestic Annual Service â scheduled filter/membrane changes, sanitisation, pressure-tank re-pressurising and leak check. ⢠Commercial PPM (Planned Preventative Maintenance) â multi-visit packages with inline instrumentation calibration, CIP (clean-in-place) membrane cleaning and water-quality logs for audit compliance. ⢠Emergency 24 h call-out â rapid response for leaks, pump failure or contamination. All visits include a comprehensive water analysis (TDS, hardness, chlorine, pH) and a written service report so you stay compliant with WRAS and local environmental regulations.