Hydrotech 765 Water Softener Reviews: Is It Any Good?

The Hydrotech 765 is a conventional salt-based ion-exchange water softener designed for homeowners who want reliable soft water without paying for a highly advanced smart control valve.

It is available in multiple sizes, has demand-based regeneration, a 5-year valve warranty and 10-year tank warranty, and can handle anything from smaller households to larger high-flow homes.

Its main weakness is that the controller is fairly basic compared with more advanced Clack- or Fleck-based systems.

Hydrotech 765 At A Glance

FeatureHydrotech HT765
TypeSalt-based ion-exchange water softener
RegenerationDownflow / co-current
ResinAquafine 8% cation exchange resin
Available Resin Sizes0.75–3.0 cu. ft.
Factory Capacity Range16,500–66,000 grains
Maximum Published Capacity19,875–79,500 grains at higher salt dose
Service Flow8–15 GPM
Salt Storage225–420 lb depending on model
Power120V input / 12V control
Water Pressure30–125 PSI
Water Temperature40–110°F
Control Valve Warranty5 years
Pressure Tank Warranty10 years
Main StrengthSimple, proven softening
Main WeaknessBasic controller compared with premium valves

My Experience With The Hydrotech 765

Hydrotech 765 Water Softener

The main thing I like about the Hydrotech 765 is that it does not pretend to be something complicated.

This is a traditional water softener.

Hard water flows through a resin bed.

The resin exchanges:

  • Calcium
  • Magnesium

for sodium ions.

Once the resin becomes exhausted, the control valve regenerates it using salt brine.

That basic process is extremely well established.

When the HT765 is sized correctly, the most obvious household changes should be:

  • Less white scale
  • Better soap lather
  • Fewer water spots
  • Softer-feeling laundry
  • Less scale around faucets
  • Less scale inside water heaters and plumbing

I also like that the 765 has several regeneration options.

It can regenerate based on:

  • Actual water use
  • Immediate meter trigger
  • Delayed meter trigger
  • Calendar schedule
  • Meter override

That is much better than an old-fashioned timer-only softener that regenerates every few days whether you used the capacity or not.

My biggest hesitation is the controller.

It works.

It is programmable.

It displays remaining gallons and regeneration information.

But it is not as sophisticated as some premium control valves that continuously adapt to household-use history.

That does not make the 765 bad.

It simply makes it a straightforward value-oriented softener.

Features of Hydrotech 765 Water Softener

  • Elaborate LCD Screen

The 765 has a very elaborate display. You can navigate through the display very easily as well. This easy-to-use LCD display will show you the time of the day, the regeneration mode, and also the number of remaining gallons.

  • Safety Float 

The brine tank of the 765-water softener comes equipped with a safety float. This safety float prevents the brine tank from being overfilled.

Such events primarily happen in the aftermath of a malfunction such as a power failure.

  • Operation During Power Failure
Hydrotech 765 Water Softener

In case there is a power failure, the valve will keep track of the time of the day for forty-eight hours.

The programmed settings are stored in non-volatile memory, and will not be lost during a power failure.

If power fails while the unit is in regeneration, the valve will finish regeneration from the point it is, once the power is restored. 

In case the valve misses a scheduled regeneration due to a power failure, it will queue a regeneration at the next regeneration time once power is restored.

  • Warranty

With the 765 water softener, you will get a five-year warranty on the control valve, and a ten-year warranty on the tanks.

Warranties on such crucial parts of the softener are a very handy deal. The time of the warranty on these parts is also very significant in comparison as most water softener products do not come with the same warranty.

  • Automatic Hard Water Bypass During Regeneration

The whole regeneration cycle can last somewhere between minutes to three hours. After this time, the soft water service will be restored. During regeneration, hard water is automatically bypassed for use in the household.

Hot water should be used as little as possible during this time. This should be done to prevent hard water from filling the water heater.

That is why automatic water regeneration is set for sometime during the night, and manual regenerations should be performed when little or no water will be used in the household.

  • Manual Bypass

In case of an emergency, such as an overflowing brine tank, you can isolate the water softener from the water supply using the bypass valve located at the back of the control.

In normal operation, the bypass is open with the on/off knobs in line with the inlet and the outlet pipes.

In order to isolate the softener, simply rotate the knobs clockwise until they lock. You can use your water-related fixtures and appliances as the water supply is bypassing the softener.

In this case, though, the water you will be using will be hard. To resume the soft water service, open the bypass valve by rotating the knobs counterclockwise.

  • WQA Gold Seal 8% Cross-Linked Cation Resin
Hydrotech M series water softener
Hydrotech M Series

The ResinTech CG8-F-HP is a high purity fine mesh strong acid cation resin sodium form.

It is amber in color and make with an eight percent cross-linked gel.

The high purity designation means that it is Gold Seal Certified by the WQA for use in potable water applications. CG8-F-HP is intended for portable water softening applications.

These applications have very high levels of iron in the feedwater, and also in places where resin depth is less than ideal.

  • Self-charging Capacitor

The capacitor on the water softener is self-charging. When not in use, the softener will charge on its own. The capacitor also keeps the time of day for forty hours, while the programming remains in the permanent memory.

Some other features of the Hydrotech 765 Water Softener

  • It comes with a heavy-duty brine tank or cabinet that has been constructed with NSF certified high-density polyethylene. It also comes with a twin tank which includes salt grids made of plastic.
  • The machine gives you the ability to manually index to the desired cycle position for faster, easier installation and service. 
  • The quick-connect fittings on the bypass are very quick and time-saving. These fittings are also available on the drain line, power cord, and brine line.

Why You Need Hydrotech 765 Water Softener?

The Hydrotech 765 water softener is based on day-day-day softening technologies. This machine deploys a method called “ion exchange” or “base exchange. The method is extremely effective when it comes to scaling control methods.

This technique is particularly useful when you are in need of permanent softening, or if soft water is important to the operation of the water filtering process.

The mechanism behind this water softening is very simple. Inside a water softener, there are resin beads that hold electrically charged ions. Hard water has elements like calcium, and magnesium in them.

But when this hard water is passed through a water softener, the calcium and magnesium ions are attracted to the charged resin beads.

The ions of these elements are removed by the softener. The water without the presence of these elements is known as soft water.

The system is controlled with very simple, user-friendly electronics displayed on an LCD screen. The main page displays the current time and the number of gallons remaining in meter mode.

It also displays the number of days remaining in the calendar clock mode.

Who Should Buy The Hydrotech 765?

I think it makes sense if:

  • Your water test confirms significant hardness.
  • You want genuine soft water.
  • You prefer a dealer-installed system.
  • You want demand-based regeneration.
  • You have a good local Hydrotech dealer.
  • You want a straightforward controller.
  • The installed quote is competitive.

Who Should Skip It?

I would compare other systems if:

  • You want maximum DIY serviceability.
  • You want a non-electric twin-tank design.
  • You dislike using salt.
  • You have complex iron/sulfur problems requiring specialty treatment.
  • Your local Hydrotech dealer has poor service.
  • A comparable Clack system costs the same or less.

Final Words

Getting a water softener will significantly change the quality of the water that you are using. The 765 is one of the best ones out there. Try to look for deals or discounts.

In case you have difficulty in installing the softener, you can hire a professional who can show you how to install it and also tell you about possible problems you might face.

We hope our Hydrotech 765 water softener reviews have been of help to you!

Clyde Mitchell

I run a hardware store nearby Court Anaheim, CA. Over the last 7 years, I have been blogging about home improvement and yes, I own ReliefInBath.comFrom me and this website, you can expect some useful tips on great ideas for a modern bathroom.

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