Regal 750 Water Softener
A ready-to-commission bi-block softener built around a 13 x 54 inch pressure tank and a pre-configured CE 1 inch control valve, supplied with 75 litres of ion exchange resin and a 125 litre overflow-protected brine tank for 3.5 m3 per hour of continuous soft water.
About the Regal 750 Water Softener
The Regal 750 is a ready-to-commission bi-block softener. It is built around a 13 x 54 inch pressure tank and a pre-configured CE 1 inch metered control valve, and it arrives with 75 litres of PC002 ion exchange resin already loaded and a 125 litre overflow-protected brine tank.
It gives 3.5 m3 an hour of operating flow, 4.3 m3 an hour at maximum, and 15 m3 of soft water between regenerations. The datasheet lists hospitality, healthcare, estates and light industrial sites drawing 3 to 4 m3 an hour.
At a glance
- What it is
- A ready-to-commission bi-block softener
- Flow
- 3.5 m3/h operating, 4.3 m3/h maximum
- Capacity
- 15 m3 between regenerations
- Resin
- 75 L of PC002, loaded
- Valve
- CE 1 inch metered, injector and DLFC fitted
- Brine tank
- 125 L with overflow protection
- Size
- 1585 × 900 × 450 mm, 100 kg
- Model code
- RF1354CE
What it does.
- 3.5 m3/h operating flow with 4.3 m3/h available at maximum
- 15 m3 of soft water between regenerations
- Supplied with 75 L of PC002 ion exchange resin, loaded
- Pre-configured metered CE 1 inch valve: injector and DLFC fitted
- 125 L brine tank with overflow protection
- Twin and duplex configurations available
Typical applications
Who the Regal 750 is for
- Hotels and hospitality sites that need a steady supply of soft water.
- Healthcare sites and estates with hard water.
- Light industrial sites drawing 3 to 4 m3 an hour.
- Operators who want a unit that arrives loaded and ready to commission.
- Sites that may need twin or duplex duty later.
How the Regal 750 Water Softener works
In general, a water softener swaps the calcium and magnesium that cause hard water for sodium, using a bed of ion exchange resin. When the resin is used up, the softener regenerates with salt brine and rinses the hardness away to drain.
In the Regal 750, the metered CE 1 inch valve counts the water that passes through. When the volume is used, it regenerates with 7.5 to 12.0 kg of salt. An injector and a DLFC (drain line flow control) are fitted, and the valve has an 11-segment top stack.
The datasheet lists feed limits: hardness up to 750 mg/L as CaCO3, iron 0.2 mg/L, manganese 0.05 mg/L, COD 5 mg/L and ammonium 0.5 mg/L. We check your water at survey.
Which one should you choose?
The Regal range runs from under-sink cabinets to twin alternating vessels. The right one depends on how much soft water you need, and how fast.
Regal 100
You have limited space under the kitchen sink and want a cabinet softener: 10 L of resin, 1.0 to 1.2 m3/h.
Regal 150
You want a little more capacity under the sink: 15 L of resin, 1.3 to 1.5 m3/h and 3 m3 between regenerations.
Regal 200
You want the most capacity in the cabinet range: 20 L of resin, 1.6 to 1.8 m3/h and 5 m3 between regenerations.
Regal 500
You need a floor-standing softener with a separate brine tank and up to 6.12 m3/h of service flow, with the media you choose.
Regal 750
You want a ready-loaded commercial softener: 75 L of resin, 3.5 m3/h continuous and 15 m3 between regenerations.
Commercial Softener RF1465SO1
You want a 14 × 65 inch tank with a CE 1 inch valve and a large 146 L brine tank, with your choice of resin or Ecomix.
Regal Twin 3672
You need soft water that never stops: two 36 × 72 inch vessels working in turn, with 18.2 m3/h of service flow.
Installation and servicing
The Regal 750 connects with G 1 inch inlet and outlet, a G 3/4 inch drain and a G 3/8 inch brine line. A 1 inch connection kit is included. The system is 1585 × 900 × 450 mm and weighs 100 kg.
The datasheet lists a 230 V, 50/60 Hz supply at 30 W, an operating pressure of 2 to 6 bar and a feed temperature of +4 to +30 °C. Options on the datasheet include a bypass assembly, a no-bypass valve, an auxiliary microswitch, a motorised alternating valve and a vertical bypass adapter. The datasheet lists the valve menu languages as EN, DE, FR and UK.
The survey is chargeable and is credited back if you go ahead.
Regal 750 Water Softener questions answered
What flow does the Regal 750 give?
3.5 m3 an hour of operating flow, and 4.3 m3 an hour at maximum.
How much soft water between regenerations?
15.0 m3.
Does it come with resin?
Yes. It arrives with 75 L of PC002 ion exchange resin loaded.
How much salt does a regeneration use?
7.5 to 12.0 kg.
What size is the brine tank?
125 L (15 x 17 x 36 inch), with overflow protection.
What is a DLFC?
A drain line flow control. It holds the drain flow steady during regeneration. The datasheet lists it, with the injector, as already fitted to the valve.
What power does it need?
230 V, 50/60 Hz at 30 W.
What water can it treat?
The datasheet lists feed limits: hardness up to 750 mg/L as CaCO3, iron 0.2 mg/L, manganese 0.05 mg/L, COD 5 mg/L and ammonium 0.5 mg/L, at +4 to +30 °C. We check these at survey.
Is a twin version available?
Yes. The datasheet lists twin and duplex configurations.
How heavy is it?
The system weight is 100 kg.
Do you supply and install it?
Yes. We supply and install it. The survey is chargeable and is credited back if you go ahead.
Related products
Figures come from the manufacturer datasheet (PDF). Reviewed November 2026.
Supplied, installed and serviced across the UK
Across most of southern and eastern England, mains water is very hard. Rain filtering through chalk and limestone dissolves calcium and magnesium, and that scale coats heating elements, so we size every system to your supply and your equipment.
Tell us about your site and what you need the water for. We specify the system, fit it and keep it running under Comprehensive Maintenance.
Source: Drinking Water Inspectorate, Drinking Water Quality in England triennial report (2020–2022).
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