You absolutely can place the jets at multiple levels for upper and lower back.

You can even have the PB create different bench levels in the spa to accommodate for user's heights. We've done this many times.

We have been using Waterway jets for over 20 years and they are the best gunite jet.

Waterway has a 3 jet manifold with 2 upper jets and one lower jet. We have used this model quite a bit. You may be interested in this.

2 models available. # 210-3410G and #210-3420G

The latter is for standard seating.

-

We built a 9x12 spa about 10 years, that we fashioned a lounge at one end complete with, neck, upper back, lower back, calf and toe jets.

So the jets can be placed anywhere.

Thank you. I figured it was something that is done, but there is limited info online about it. He said I need to keep all the jets on the same level, so do you know if the 3 jet manifold would be considered on different levels?

I did see online you can just add another pump too, but have no clue the cost of that.

You don't need to keep the jets on the same level.

Yes, the 3 jet manifold is at different levels.

Not sure what you mean about another pump being added.

Our spas have a 2 pump system whereas there's a separate pump for filtration and heating, and a dedicated pump just for the jets. We never utilize the filtration pump to operate the spa jets.

Our pool/spa combo projects share the common filtration system. We don't have a separate system for either body of water. That's costly and essentially the equipment takes up double the space.

We install Jandy automation to allow control between pool and spa mode as well as controlling lighting, heat temps, pumps, etc.. for both pool and spa

Here's the link to Waterway's 3 jet manifold.

https://waterwayplastics.com/product/3-jet-thread-in-manifold/

Wish I knew more to tell you what I mean, as you are the most helpful person I have encountered!

Here is the quoted text explaining his response so far and a screenshot of the type of equipment we will be getting.

"We use Waterway jets.You can have a max of 8 jets with your pump. We put 6 as a standard so that they have more pressure. The seats are designed at 1'6" current of depth. I can make that higher or lower if you'd like without changing the price. All of the jets need to be at the same level but can be space however you like. Imagine it like one big "hoop" of pipe all the way around the spa. That "hoop" must all be one level or you will loose pressure. But you can move your 6 jets anywhere you want around the hoop. If you want to add another pump, you can add an additional "hoop" at another level. In terms of changeable jets, I finally found a company that makes interchangeable jets heads: https://www.paramountpoolstore.com/parajets/ I had construction look into these and they confirmed that we can install these. So the best thing to do is for you to decide which ones you want and ship them to your house. When it's time to install jets, our guys will install them for you. They will not be a part of our warranty since they are not a company we work with, but they aren't very expensive if you didn't like them"

False statement setting jets at different levels will create a loss of pressure. Would only be the case if there's a spaghetti maze of piping. Seen that many times.

I've explained correct plumbing practices on another thread on this forum when someone had a question about spa jet performance.

Here's a zip brief. Jets require 10 GPM for optimal operation. Once the number of jets are determined, a pump that can deliver that GPM must be chosen. Next, calculations must be performed to determine the proper pipe size from the pump to the spa. The complete spa jet piping manifold must be arranged in a loop fashion, with 2 points of entry from the pump/water source. Same for the air blower.

So if you want (8) jets, a pump capable of delivering 80 GPM is required. The piping size usually from the jet pump return, is 3". The suction must be equally sized. Too little water supply, will never give the proper result at the jets.

I tell clients this illustration. Try sipping water through a cocktail straw. Never enough supply. Use a giant straw from say McDonald's, (no, I don;t eat there!), you'll get much more of a supply.

My current pool/spa combo pool, the spa is 10' round with (16) jets. (4) sets of the 3 jet manifold, and an additional (4) single jets My variable speed pump can deliver the 160 GPM needed. We also ran 4" PVC for the supply and the return. Moving a lot of water, but it's required to achieve proper results.

At the loop, the pipe size is reduced to accommodate the jet body sizes. The idea is get a large supply to the spa, and then reduce down as needed.

We heat bend all of our rigid PVC to limit restrictions. Our special fittings are less restrictive as well. We do not use ANY FLEXIBLE PVC PIPE. ANYWHERE!!!

Waterway has plenty of jet internals with various patterns. Why anyone would use another manufacturers is baffling to me. Waterway specifically designs their internals to work with their jet bodies.

Our spa benches have 18" of water depth. Actual overall height is 21". Generally the water line is 3" below the top thus, the 18".

I give you this information based on my experience.

2021 is the beginning of my 35th year in business. I have about another 3 years in the trade before that.

I could not read your attachment, which I guess states the equipment particulars.

Thank you for your help. I didn't get as far as I wanted at our final meeting today. We settled on 3 seats with 1 jet each and a 4th seat with the manifold you recommended.

https://waterwayplastics.com/product/3-jet-thread-in-manifold/

I could not even get them to consider calf or feet jets, they just kept telling me I wouldn't be able to get enough air to go down there and the "piece" could get too hot and cause the hot tub to shut down for 30 minutes.

A bit bummed, but they felt this makes the most sense.

Sounds to me, they have no idea what they are doing and are making excuses for their lack of knowledge.

No idea about a "piece" getting too hot and cause a shutdown?????

The current project I mentioned in my previous post, as I had said has (16) jets. A single air blower feeds that entire set up. I also added an additional air blower to feed (6) air jets on the spa floor to create a "champagne" effect. It fills in the dead spot in the center as the spa is so big. So, air can be sent anywhere.

Waterway makes a mini jet which works perfect for calf, neck and the like, jets.

Do you know an approximate cost for moving from 6 jets to 12 jets? By approximate, I mean a pretty big range, like is it $500, $1,000 or more than $2K.

Here is my current equipment:

Pool size 425, Spa Size 47

Circulation Pump: Jandy equipment 2HP

Heater: Jan JXI 400,000 BTU Propane

Not sure what else matter to know the possibilities.

I attached a mock up.

It is a variable speed pump. So can it handle more jets in your opinion?

Do I need any other equipment to add more jets besides the jets, piping and fittings?

Did they use the filtration pump to also work the jets?

We never have the filtration pump do double duty. I tell my customers it's for heating and treating only.

We always use a separate pump just for the jets. Same goes for any water features, i.e. stone water falls, Sheer Descent water features, deck jets, laminar jets, etc...

The PB will have to do some math and calculate for the correct pump and pipe size, certainly for the jets, and also for the filtration system. Not confident this is his end goal.

Most builders work I see, over size the pump and under size the plumbing. Then they blame the pump company saying something about warranty, being defective, blah, blah, blah.

Here are all the specs I could locate:

• Large Capacity Plumbing lines, 2.5" Standard on all Spas
• 45-Degree and Sweep Fittings for Increased Water Flow Efficiency
• Filter: 460 SQ FT CV
• Circulation Pump: Jandy ePump (2.7HP) Energy Efficient Pump with Large Capacity Cartridge Filter (says it's variable speed)
• Sanitation: Jandy Nature2 Fusion Inground
• Heater: Jandy JXI 400,000 BTU Propane
• Automation: Jandy RS-PS4
• Pool Control: Jandy iAqualink
• Bubblers: 2
• Spa Jets: 6

I don't know enough to know what it all means and they kind of blow off any questions and just explain why I can't have more jets with words I don't know.

From what you have said above and I think that I may understand is that the Circulation pump is too big, it would be better to get a smaller (less horsepower one) and then get a second, dedicated pump for the spa?

Correct, circulating pump over sized. A smaller Jandy VS pump is better. We use the FloPro model. The 1.65 model would be fine for circulating and operating the bubblers.

Minimum 2.5" pipe for the skimmers and floor suctions.

An additional pump for the jets only. We use the Plus HP 2.7 variable speed. But, our piping is sized accordingly. As mentioned, it could 3" pipe or 4" for both suction and return.

I'll send you a general diagram of piping layout on a spa.

You rock. Thank you so much!

If you go to my Houzz message center, I can send the layout to you