What is an Outdoor Whirlpool Hot Tub Diverter Valve?

As‍‌‍‍‌ people's lifestyle shifts towards outdoor leisure, outdoor whirlpool hot tubs too are undergoing change. They no longer are an exclusive pleasure in upscale homes but have become a standard amenity for residential backyard entertainment, hospitality establishments like hotels and resorts, commercial spa centers, and wellness projects as well.

Typically, when people decide on a outdoor whirlpool hot tub, their considerations are mostly limited to visible features such as the number of massage jets, heating power and speed, the temperature control ability, the exterior style, and the presence of smart control features. Unfortunately, they rarely realize or pay attention to the hidden parts of the water system that are actually affecting their spa experience, and the diverter valve of an outdoor hot tub is definitely one of them.

Lots of people have the same kind of problems while using outdoor whirlpool hot tubs: How come some parts of the body get a good massaging effect while, on the other hand, other parts with the presence of multiple massage jets do not really feel a deep massage? How come the water pressure gets reduced significantly in other parts while turning on a number of the massages? What makes some massage areas totally lose their functionality after a certain period use? Generally, these issues are caused by the way the pump water is shared or diverted for different uses in the outdoor spa, which is the primary role of a diverter valve, besides directing the direction of water and managing different areas' water pressures.

As far as the industry marketing goes: some outdoor whirlpool hot tub products are now emphasizing their advertising messages around the features like "number of massage jets," "number of horsepower pumps," "number of massage styles," etc., whereas they are ignoring one critical aspect that is, the efficiency and effectiveness of water circulation circuits design。In fact, a high-quality outdoor hot tub should have more than a high power massage pump. It also requires an innovative and logical water circulation structure, a well-balanced piping system, dependable and consistent water flow control devices, and last but not the least, effective valve system design.

So if a manufacturer of the outdoor whirlpool hot tub product is not able to design a diverting water valve, whichwould have to serve the purpose of distributing and controlling the pump pump water, they may get into various kinds of problems like inconsistency of the massage experience, water waste, noise production, etc., and it's difficult to carry out maintenance, etc., even if they have powerful pumps.

If consumers are to make the correct purchase choice and manufacturers to optimize spa system design, it is essential for the former to be able to know not only how, why an outdoor whirlpool spa hot tub diverter valve works, but also what it does, which will be explained further in the coming text.

What is an outdoor whirlpool hot tub diverter valve?

An outdoor whirlpool hot tub diverter valve, also called a SPA diverter regulator, a jet water flow distributor, or simply a water flow switching valve, is a manual valve device installed inside the hot tub water piping.

The main purpose of a diverter is to distribute the pump's water supply at different massage zones, or if there are several groups of nozzles available, then to allow a change of water supply direction.

In short, in most cases, an outdoor whirlpool hot tub would not have each of the nozzles jetting water at a uniform pressure at the same time. Since the number of massage jets is usually large, and the water pump capacity is rather limited, a diverting valve is necessary in these conditions to manage the water flow.

A typical home-use outdoor whirlpool hot tub is equipped with 20 to 60 massage nozzles, a commercial spa or a high-class tub-type hot tub would normally have 80 or even more. It is the pump and the jet nozzles that are the two most important elements in an outdoor whirlpool hot tub.

If each of the jets is to open at the same time, a much higher pressure of the water pump is needed, to get even a little pressure at each nozzle, otherwise the jets will not give any massage.

A whirlpool spa hot tub diverter valves give several major functions as follows:

• It can increase the water pressure to one of the massage areas; the most popular one would be the back massage area;

• It can allow water pressure for the leg massage area, for instance;

• It enables you to choose the level of massage you would like for the different seats,

• Or if the number of guests varies, the diverter valves can be set to match the changing requirements.

Hence, the outdoor whirlpool hot tub diverter valve is practically a "hot tub water flow control center." ‍‌‍‍‌

‍‌‍‍‌ What is an outdoor whirlpool hot tub diversion valve and how does it works? 

 The main way an outdoor whirlpool hot tub diversion valve works is by changing the flow direction and ratio of different water channels. 

 Normally, an outdoor whirlpool hot tub pumps water out of the tub or filtration system at the lowest level of the pool, and then through the heater to warm up the water before being used for massaging. When water passes through the divertor valve, its core opening/closing mechanism decides which pipeline is to be used depending on the user's rotation.

 For example: 

 Rotating the diverter valve to "Zone A", the inner valve core will open up the valve leading to Zone A more, thus directing the water flow from that part into the massage nozzles there. 

 When the user sets it to "Zone B", the valve changes the direction of the water flow, so a different set of nozzles gets more water. 

 If positioned in midway, several areas can be supplied simultaneously with the use of this device. 

 In this regard, the diverter valves are similar to regulating valves in home water supplies, only that they have to withstand much harsher conditions outdoors; such as: 

 • Constant circulation of very hot water;

 • Chlorine or ozone-treated water environments;

 • Very high water pressure variation;

 • Regular rotation adjustment.

 Therefore, good-quality diversion valves are usually made out of anti-aging and corrosion-resistant materials like ABS engineering plastics, PVC or special composite materials to make sure it runs well for a long time.

 Why are diversion valves needed for outdoor whirlpool hot tubs?

 A lot of questions have been raised by consumers like "If it's already got pump and massage nozzles, why is a diverter valve required for my outdoor whirlpool hot tub ? "

In reality, diversifier valves perform a few functions to enhance the spa experience.

 Diversifier valves firstly optimize the intensity of massage, The level of massage delivered by an outside whirlpool hot tub relies not only on pump power but also on the proper distribution of water flow. A single nozzle could barely take pressure from the water if there is no way to distribute water through diversifier valves, given that many massaging nozzles are working at the same time. 

 Take for example a 300 litres/min output from a massage pump, 30 massage nozzles can be connected. According to such calculation, each nozzle will be able to receive 10 litres per minute on average. However, due to pipe loses, elbow resistance and height differences in the system, pressure is likely to further drop in certain parts.

 With the help of a diverter valve, water can be concentrated at the right water outlets to the user, the massage effect thus gets strengthened.

 Secondly, diversion valves enhance power saving. Pumps are one of the energyconsuming parts in a whirlpool hot tub when running an outdoor. Massaging pump power consumption, depending on the specifications, generally ranges between 0.75 and 2.2 kW, commercial units requiring even more. An effective water flow control can avoid the need to use a high-power heater so that the desired level of massage can be attained.

 A reasonable water distribution lowers unnecessary energy consumption and raises the performance of equipment.

 Third, diversion valves make it more comfortable for different users. For an outdoor whirlpool spa hot tub with 5 people or even bigger models, every user may have a different idea about the intensity of the massage Some like the back to be well-massaged whereas some care for their feet to get stimulated. A diversion valve can give everyone exactly what they ‍‌‍‍‌want.

What are the common types of diversion valves for outdoor whirlpool hot tubs?

Based on their structure and usage, outdoor whirlpool hot tub diversion valves can be mainly divided into several categories.

The first type is the manually operated rotary diversion valve.

This is currently the most common type in home outdoor whirlpool hot tubs. Users change the internal water flow direction by rotating the top control knob. This type of diversion valve has a simple structure, high reliability, and low maintenance costs, and is therefore widely used in home spa equipment.

Advantages include:

• Intuitive operation;

• Lower cost;

• Lower failure rate;

• No need for an additional electrical control system.

Disadvantages include the inability to be remotely controlled, requiring manual adjustment by the user.

The second type is the automatic electric diversion valve.

With the development of smart outdoor whirlpool hot tubs, some high-end products have begun to adopt electrically controlled diversion systems. Users can adjust the water flow mode via control panel, remote control, or even a mobile app.

This system can achieve:

• Automatic massage programs;

• Timed zone switching;

• Intelligent scene modes.

However, due to the addition of motors and control modules, its structure is more complex, and the requirements for waterproofing and maintenance are higher.

The third type is the multi-channel diversion valve.

Large outdoor whirlpool spa hot tubs, commercial spas, and hotel projects typically use multi-channel designs, which can manage multiple water areas simultaneously. For example:

• Back massage area;

• Waist massage area;

• Leg massage area;

• Foot massage area.

This design can meet the needs of multiple users simultaneously.

What is the relationship between outdoor hot tub diversion valves and massage nozzles?

The massage nozzles are the components users directly experience, while the diversion valve is the behind-the-scenes component controlling the massage effect.

Many people believe that the more nozzles, the better the massage effect. However, in reality, increasing the number of nozzles places higher demands on the water system.

For example:

An outdoor whirlpool spa hot tub with 40 nozzles, without proper zoning design, may experience a drop in pressure across all nozzles; while a product with 25 high-quality nozzles and a well-controlled diversion valve may provide a stronger and more stable massage experience.

Therefore, when evaluating the performance of an outdoor whirlpool spa hot tub, one should not only look at the number of nozzles, but also consider:

• Pump flow rate;

• Pipe diameter;

• Diversion valve design;

• Nozzle layout;

• Water circulation efficiency.

Professional manufacturers typically optimize each massage zone by simulating water pressure, optimizing pipe length, and adjusting diversion ratios.

What‍‌‍‍‌ are some common issues outdoor hot tubs can have with diversion valves?

Although the basic structure of diversion valves is simple, they can still be prone to breakdown if they're constantly exposed to high temperatures, flow of water and chemical environments over a long period of time.

The first issue is a hard-to-turn valve.

This might be a result of the accumulation of minerals and impurities inside the valves if users are not keeping their outdoor whirlpool spa hot tubs well maintained, plus the water could have a very low lubrication content. The problem is that the longer you keep running the whirlpool spa hot tub, the more mineral deposits you get which will make the operation of the hot tub harder and harder as they build up.

The lack of control over the turning of the water direction is the second issue at hand.

If not addressed, degraded internal seals can cause water from different sources to get mixed and cross-contaminated; this means that even after closing one area, there could still be running water in other areas.

Another malfunction is leaking valves.

It is through this kind of defect that some water will gradually flow to other areas. If not fixed, this is a problem.

One more problem is a noticeable drop in massage jet pressure caused by a blockage inside the valve which results in the narrowing of the area through which water flows thereby also decreasing the pressure delivered to the jets.

Besides taking care of the filter, water, and heating system of the outdoor hot-tub every day, users should also regularly check water control components of such equipment. 

What is the right technique for maintaining a hot-tub diverter valve?

In order to prolong the life of the diverter valve users should do maintenance on different aspects.

In the first place, it is important to keep the water quality at a good standard. Calcium and magnesium levels being too high and the formation of scale due to calcium carbonate deposition in the water of an outdoor whirlpool spa hot tub over a long time may affect or even damage the structure inside the valve.

You could also consider getting a test done occasionally by professionals.

Ensure that the pH level is kept between 7.2 to 7.8;

The concentration of the disinfectants is according to the equipment needs;

Filtration system should be kept regularly cleaned;

Besides, the use of a pipe cover will also prevent the formation of an algae blanket on the surface of the water pipe of an outdoor whirlpool spa hot tub, preventing the water pipe from being blocked.

Secondarily, refrain from prolonged and forceful turning of the valves. Even if the diverter system is a type of valve that allows you to control the movement through the different settings, if you do it with too much force and speed, you can end up breaking up the internal seals that are supposed to hold everything in place. That is why manufacturers recommend you only go as far as turning the valve by the number of notches that are needed to get to the position you want for the operation or closing the area.

Thirdly, the maintenance of the entire system should be carried out at intervals suggested by the manufacturer. It can be that high-grade outdoor whirlpool spa hot tubs will include the maintenance calendar which will tell when to check valves, when to flush water and when to replace parts.

Besides the technical aspects of the water system there may be some features of the product which have to do with the design of the water system zoning which also deserve special attention when making the purchase of a whirlpool spa hot tub for your house outdoor.

How to choose an outdoor hot spa with a high-performing diverter valve system?

When consumers buy outdoor whirlpool spa hot tubs, apart from paying attention to such things as price and appearance, they should fully understand the internal water system design.

Top outdoor whirlpool spa hot tubs usually have the following characteristics:

First, the water system zoning is done in such a smart way that each massage zone is properly connected to its jet head through the water supply pipes so that the jets are getting just the right amount of water.

Second, there is a matching pump size. There are three main factors to be considered when selecting the power of the pump: the number of jet heads, the structure of the pipe system, and the hot tub size.

Third, good-quality diverter valves.

The valve quality determines whether the whirlpool spa hot tub will work well or not. As long as the customer gets a well-designed model and the manufacturer uses the high-performance parts, the customer can enjoy a trouble-free hot tub with perfect water control even after long-term use.

Fourth, the manufacturer's comprehensive after-sales services.

After-sales services of a whirlpool spa hot tub manufacturer are important in the long term usage of the whirlpool spa hot tub. A customer can rely on a professional manufacturer who will not only supply the product to him but also support and provide him with the required tools and components whenever they might be needed. So besides product quality, the customer is expected to have confidence in the technical level, supportability, and spare part supply capability of the manufacturer.

In the case of OEM/ODM orders, manufacturers are required to make the hot-tub's water systems suitable for the customers' needs. This might lead to completely different types of diversion methods if a residential, hotel, or commercial spa hot tub is the one being ‍‌‍‍‌made.

FAQ: Frequently Asked Questions about Outdoor Hot Tub Diversion Valves

1. Do outdoor whirlpool spa hot tubs always need diversion valves?

Not all small units require independent diversion valves, but for outdoor whirlpool spa hot tubs with multiple massage zones and multi-nozzle designs, diversion valves can significantly improve water flow control and user experience.

2. What are the symptoms of a faulty outdoor whirlpool spa hot tub diversion valve?

Common symptoms include decreased massage intensity, inability to switch water flow, no water in some nozzles, or difficulty rotating the valve.

3. Does a diversion valve affect the power consumption of an outdoor whirlpool spa hot tub?

A well-designed diversion valve can help optimize water flow distribution, making the water pump work more efficiently, thereby indirectly reducing energy waste.

4. How often should an outdoor whirlpool spa hot tub diversion valve be replaced?

The specific lifespan depends on the frequency of use, water quality, and product quality. Under normal maintenance, a high-quality diverter valve can typically last for many years.

5. Can I replace the diverter valve of an outdoor whirlpool spa hot tub myself?

If it's just a simple external knob problem, some users can handle it themselves. However, if it involves disassembling the internal water system, it's recommended to have it done by a professional to avoid leaks or system damage.

6. What water system issues should I ask the manufacturer when purchasing an outdoor whirlpool spa hot tub?

It's recommended to ask the manufacturer about the water pump specifications, the number of nozzles, the water system zoning method, whether a diverter valve design is used, and the after-sales maintenance plan.