Brand Specific Forums > Jacuzzi Hot Tubs
Question for Jacuzzi Experts
smackman:
Okay, I am a Engineer by former trade so I like to "drill down" on situations. LOL My Jacuzzi 2010
J 465 has a primary filter and a secondary filter. Here is what I discovered;
The water ONLY flows across the secondary filter when one the blower motors or motors are running. When the Hot Tub is just recirculating in Primary mode, No water flows across the Secondary filter.
If you set up the timers for primary and secondary filter, you will see that the secondary filter timer actually runs a blower motor and the recirculation pump. It is near to impossible to take off the secondary filter cap when in this mode.
When the Primary filter is running, Water only flows across the primary filter; The cap is easily removed without resistance on the secondary filter.
Can someone explain what is going on in the underneath plumbing to make this happen?
Thanks for the help.
smackman:
Also, I have learned that Pump 1 has to be running for the secondary filter to be functional. The circulation pump uses only the big Primary filter. Pump 1 Brings the secondary filter into "play".
Pump 2 just kicks ass for a great Hot Tub experience.
Jacuzzi Jim:
--- Quote from: smackman on April 29, 2012, 10:29:38 am ---Okay, I am a Engineer by former trade so I like to "drill down" on situations. LOL My Jacuzzi 2010
J 465 has a primary filter and a secondary filter. Here is what I discovered;
The water ONLY flows across the secondary filter when one the blower motors or motors are running. When the Hot Tub is just recirculating in Primary mode, No water flows across the Secondary filter.
If you set up the timers for primary and secondary filter, you will see that the secondary filter timer actually runs a blower motor and the recirculation pump. It is near to impossible to take off the secondary filter cap when in this mode.
When the Primary filter is running, Water only flows across the primary filter; The cap is easily removed without resistance on the secondary filter.
Can someone explain what is going on in the underneath plumbing to make this happen?
Thanks for the help.
--- End quote ---
Your circ pump draws through the floating wier side of the filtration, pump 1 draws through the closed system. Pump 2 draws from two of the suctions in the btm of the spa. Pump 2 use to draw from the closed system but they changed it.
As far as plumbing goes pump 1 is tied into the fitration (closed system) then it also probably draws from one of the suctions as well. There should be a check valve built in between the filtration part and the suction part then tee's to the pump. This is so if the filter becomes so clogged up, the check valve will open and alow water to come from someplace else other than the closed system.
Most spas today "except" the upper end H,Spring and all the Cal-Spa's will always have multiple suctions to draw from so you don't have so much suction coming from one suction that a child or (adult for that matter) can be trapped by it.
VGB act I believe. Virginia Graham Baker act which you can look up if you wish, a very sad story that has changed safety standards in pools and spa's.
smackman:
--- Quote from: Jacuzzi Jim on April 30, 2012, 02:42:00 pm ---
--- Quote from: smackman on April 29, 2012, 10:29:38 am ---Okay, I am a Engineer by former trade so I like to "drill down" on situations. LOL My Jacuzzi 2010
J 465 has a primary filter and a secondary filter. Here is what I discovered;
The water ONLY flows across the secondary filter when one the blower motors or motors are running. When the Hot Tub is just recirculating in Primary mode, No water flows across the Secondary filter.
If you set up the timers for primary and secondary filter, you will see that the secondary filter timer actually runs a blower motor and the recirculation pump. It is near to impossible to take off the secondary filter cap when in this mode.
When the Primary filter is running, Water only flows across the primary filter; The cap is easily removed without resistance on the secondary filter.
Can someone explain what is going on in the underneath plumbing to make this happen?
Thanks for the help.
--- End quote ---
Your circ pump draws through the floating wier side of the filtration, pump 1 draws through the closed system. Pump 2 draws from two of the suctions in the btm of the spa. Pump 2 use to draw from the closed system but they changed it.
As far as plumbing goes pump 1 is tied into the fitration (closed system) then it also probably draws from one of the suctions as well. There should be a check valve built in between the filtration part and the suction part then tee's to the pump. This is so if the filter becomes so clogged up, the check valve will open and alow water to come from someplace else other than the closed system.
Most spas today "except" the upper end H,Spring and all the Cal-Spa's will always have multiple suctions to draw from so you don't have so much suction coming from one suction that a child or (adult for that matter) can be trapped by it.
VGB act I believe. Virginia Graham Baker act which you can look up if you wish, a very sad story that has changed safety standards in pools and spa's.
--- End quote ---
WOW! Thanks for the expert explanation. Your knowledge is very impressive. Most Hot Tub owners could care less; I just like to know the "bolts and screws" of a system.
Yesterday, I set the Secondary filter to run for 90 minutes. The Hot Tub Temp. was 100; the set point was 98. When the 90 minutes was up, My Damn Jacuzzi was at 104 degrees! ;D I generally do 101 and 104 was a "goods night sleep" after 20 min of Hydrotherapy.
Jacuzzi has a extremely temperature efficient hot tub.
TwinCitiesHotSpring:
--- Quote from: Jacuzzi Jim on April 30, 2012, 02:42:00 pm ---
--- Quote from: smackman on April 29, 2012, 10:29:38 am ---Okay, I am a Engineer by former trade so I like to "drill down" on situations. LOL My Jacuzzi 2010
J 465 has a primary filter and a secondary filter. Here is what I discovered;
The water ONLY flows across the secondary filter when one the blower motors or motors are running. When the Hot Tub is just recirculating in Primary mode, No water flows across the Secondary filter.
If you set up the timers for primary and secondary filter, you will see that the secondary filter timer actually runs a blower motor and the recirculation pump. It is near to impossible to take off the secondary filter cap when in this mode.
When the Primary filter is running, Water only flows across the primary filter; The cap is easily removed without resistance on the secondary filter.
Can someone explain what is going on in the underneath plumbing to make this happen?
Thanks for the help.
--- End quote ---
Your circ pump draws through the floating wier side of the filtration, pump 1 draws through the closed system. Pump 2 draws from two of the suctions in the btm of the spa. Pump 2 use to draw from the closed system but they changed it.
As far as plumbing goes pump 1 is tied into the fitration (closed system) then it also probably draws from one of the suctions as well. There should be a check valve built in between the filtration part and the suction part then tee's to the pump. This is so if the filter becomes so clogged up, the check valve will open and alow water to come from someplace else other than the closed system.
Most spas today "except" the upper end H,Spring and all the Cal-Spa's will always have multiple suctions to draw from so you don't have so much suction coming from one suction that a child or (adult for that matter) can be trapped by it.
VGB act I believe. Virginia Graham Baker act which you can look up if you wish, a very sad story that has changed safety standards in pools and spa's.
--- End quote ---
are some of the new Cal's setup differently? all the new models I've seen still have bypasses on the bottom of the spa, but then again they have dozens and dozens of models so admittedly I haven't seen them all of course. To my knowledge Hot Spring is the only tub still setup to filter 100% of the water while jets pumps are running
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