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Runxin F73 Tandem Water Softener Valve 1"
₺49,864.40
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Installation is a service · plumbing is the customer’s responsibility
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Across Türkiye
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Across Türkiye · 1–3 business days
2-Year Warranty
Misuse is not covered.
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- SKU
- WP-FV-023
- Category
- Control Valves, Water Treatment Spare Parts
Single Valve · U1 / U2 · 3 m³/h
Uninterrupted Softening Across Two Tanks with the Runxin F73 Tandem Water Softener Valve
The Runxin F73 Tandem Water Softener Valve is a 1 inch, volumetrically controlled valve that runs two softener tanks (U1 and U2) alternately from a single valve. While one tank is in service supplying soft water, the other goes into regeneration or stands ready. With a service flow rate of 3 m³ per hour, an 8–14 inch tank range and a working pressure of 1.5–6 bar, it suits small and medium-scale lines in continuous use.
- Connection
- 1" Inlet-Outlet
- Service Flow Rate
- 3 m³/h
- Tank Diameter
- 8"–14"
01Problem & Solution
Soft Water That Stops During Regeneration
Problem
The Regeneration Gap in a Single Tank
In a single-tank softener the tank goes out of service while the resin regenerates; during that time hard water reaches the installation or the flow stops. Moving regeneration to the night does not fully remove the risk of hard water at points that draw water all day, such as boilers, laundries, kitchens or production lines.
Solution
Automatic Switchover Between U1 and U2
The Runxin F73 Tandem Water Softener Valve uses the two tanks in turn by switching the tank in service between U1 and U2. When the tank in service reaches the set water volume, the other tank takes over and the exhausted tank is regenerated; the flow of soft water is not interrupted.
02Key Features
Compact Tandem Control
The Runxin F73 Tandem Water Softener Valve manages a two-tank softening system from a single valve and a single display.
Continuous Water Supply
While one tank is being regenerated the other stays in service; Runxin specifies this valve for applications that need a continuous water supply.
Volumetric Control
The volume of water passing through the tank is metered; regeneration starts according to actual consumption, not the number of days.
Down-Flow and Up-Flow
The same valve offers both down-flow and up-flow regeneration; the choice is made from the programme menu.
Multi-Colour LED Display
If the coloured bar on the display is scrolling, the tank is in service; if it is still, the tank is in regeneration.
Manual Regeneration
With the manual button on the front panel, regeneration can be started whenever needed without waiting for the programmed time.
Button Lock
If the buttons are not touched for 1 minute, the panel locks; this prevents the settings from being changed by accident.
03Technical Specifications
Valve Specifications
| Feature | Value | What it does |
|---|---|---|
| Brand | Runxin | The manufacturer. The valve and membrane brand decides how easily spares can be found. |
| Model | F73A · 17603 | The manufacturer’s model code. Spares and service are matched by this code. |
| Valve Type | Single Valve · Two Tanks (U1 / U2) | How the valve works. |
| Inlet and Outlet | 1" Male | |
| Service Flow Rate | 3 m³/h | |
| Control Type | Volumetric (Flow-Controlled) | How the backwash timing is decided. A flow-controlled system saves both water and salt. |
| Tank Diameter | 8"–14" | |
| Working Pressure | 1.5–6 bar (0.15–0.6 MPa) | |
| Water Temperature | 5–50 °C | |
| Regeneration | Down-Flow / Up-Flow | How the resin is regenerated. This is where salt consumption comes from. |
| Drain Connection | 1/2" Male | |
| Brine Line Connection | 3/8" Male | |
| Mounting Base | 2.5"-8NPSM | |
| Distributor Tube | 1.05" Outer Diameter | |
| Feed Water Turbidity | < 5 FTU | |
| Display Type | Multi-Colour LED |
04Applications
Where Is It Used?
The Runxin F73 Tandem Water Softener Valve is used where a service flow rate of 3 m³ per hour is enough and the soft water supply must not be interrupted at any time of day.
Cafés and RestaurantsHotels and GuesthousesLaundriesSmall Boiler RoomsApartment Building InletsWorkshops and Small-Scale ProductionCentral Heating CircuitsDishwashing Lines
05How It Works
How Does the Runxin F73 Tandem Water Softener Valve Work?
-
Service: U1 On Line
Hard water is softened as it passes through the resin bed in tank U1 and flows to the installation; tank U2 waits in a regenerated state.
-
Switchover When the Volume Is Reached
When the water passing through U1 reaches the set volume, the valve transfers service to U2 and U1 is taken into regeneration.
-
Backwash
Water is passed through the resin bed in the reverse direction; the bed is loosened and the accumulated sediment is flushed to the drain.
-
Brine and Slow Rinse
Brine drawn from the brine tank passes slowly through the resin and regenerates it; a slow rinse follows.
-
Brine Tank Refill
Water is fed to the brine tank for the next regeneration and a fresh brine solution is prepared.
-
Fast Rinse and Standby
A fast rinse flushes out the remaining brine; U1 stands ready again, and the same cycle is repeated for U2 when its turn comes.
06Making the Right Choice
Is the Runxin F73 Tandem Water Softener Valve Right for Your System?
When choosing, the flow rate, tank diameter, pressure and temperature, and the condition of the feed water should be assessed together.
Flow Rate
The service flow rate is 3 m³ per hour. If the facility’s peak-hour consumption is above this, larger tandem valves with 1.5 inch connections are considered.
Tank Diameter
The valve is suitable for tanks of 8–14 inch diameter; the tank and resin volume are determined by the water hardness and daily consumption.
Pressure and Temperature
The mains pressure should be within 1.5–6 bar and the water temperature within 5–50 °C. If the pressure exceeds 6 bar, a pressure reducer is fitted ahead of the valve.
Feed Water
The turbidity of the feed water should be below 5 FTU; for water carrying sand and sediment, a pre-filter is added ahead of the valve.
07Maintenance and Use
For a Long Service Life
A few simple checks are enough for the Runxin F73 Tandem Water Softener Valve to operate reliably.
- Check the salt level in the brine tank regularly; after a regeneration without salt, the tank will not work at full capacity.
- Watch the coloured bar on the display: a scrolling bar shows the tank is in service, a still bar that it is in regeneration.
- If “12:12” is flashing on the display after a long power cut, simply re-enter the time of day; the other settings are retained.
- If the panel is locked, press the up and down buttons together for 5 seconds to unlock it; if no action is taken, the panel locks again after 1 minute.
- Filters, membranes, resin and salt are consumables; valves, pumps and tanks are durable spare parts. For valves and spare parts, see the Control Valves category.
08Frequently Asked Questions
Common Questions
What does the Runxin F73 Tandem Water Softener Valve do?
It runs two softener tanks alternately with a single valve. While one tank is in service supplying soft water, the other goes into regeneration or waits; this way soft water reaches the installation even during regeneration.
What do U1 and U2 mean?
They indicate the two tanks managed by the Runxin F73 Tandem Water Softener Valve. Runxin states that the tank in service is switched between U1 and U2; when the tank in service reaches the set volume, the other one takes over.
Are the settings lost if the power goes off?
No. According to Runxin, the settings are retained. If the power cut lasts more than 3 days, “12:12” flashes on the clock display and only the time of day needs to be re-entered.
Should down-flow or up-flow be chosen?
Both methods are available on the same valve and are selected from the programme. With up-flow regeneration, backwashing can be done at set intervals rather than at every regeneration; the clearer the feed water, the longer the interval can be.
What should be done if a higher flow rate is needed?
The service flow rate of the Runxin F73 Tandem Water Softener Valve is 3 m³ per hour. For higher flow rates, larger tandem valves with 1.5 inch connections or two-tank industrial systems are considered.
Does the Runxin F73 Tandem Water Softener Valve come with a warranty?
Units, valves, pumps and tanks carry a 2-year warranty and taps a 1-year warranty. Filters, membranes, resin and salt are consumables and fall outside the warranty. Misuse is not covered by the warranty.
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Installation
Installation is a service · plumbing is the customer’s responsibilityFitting the part falls under our service work and is subject to a service fee. Plumbing labour and any pipes, valves and fittings are not included in the price; these items are the customer’s responsibility.
Warranty
2 years · manufacturerThis product is covered by a 2-year manufacturer warranty. During the warranty period, labour and parts are free for faults arising from manufacture. Consumables such as filters, membranes and resin are outside warranty cover — they are replaced when their service life ends; they do not fail.
Withdrawal and returns
Distance sales agreementThe right of withdrawal and the return terms are set out in detail in the distance sales agreement. Systems that have been installed and commissioned, and made-to-order products, are outside its scope.
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