Product Information
Description
- Darlly SR300
- Inner and outer cartridges
- S7M120 fitment
Darlly SR300 Inner and Outer Cartridge Set for Sta-Rite System 3 S7M120
Replace both cartridges with one set.
The Darlly SR300 replacement cartridge set includes the inner and outer filters for the Sta-Rite System 3 S7M120. It gives you both elements when worn or damaged media needs replacement. Match your filter tank model to S7M120 before ordering this set, listed as SKU PST-17-777-2700.
Why PST Customers Pick This
Inner and Outer Included
The set supplies both cartridges used in the compatible filter, keeping the inner and outer replacement elements together in one order.
Match the S7M120 Model
Use the model on your filter tank to confirm fitment. This SR300 listing is specified for the Sta-Rite System 3 S7M120 cartridge arrangement.
Replace Worn Filter Media
Replace damaged or worn cartridges with the matched Darlly set. Follow the filter system manual when removing, seating and reinstalling the cartridges.
Specifications
| Product Identification | |
|---|---|
| Manufacturer | Darlly Filtration |
| Part Number | SR300 |
| SKU | PST-17-777-2700 |
| Product Type | Replacement pool filter cartridge set |
| Fitment | |
| Compatible Series | Sta-Rite System 3 |
| Compatible Model | S7M120 |
| Set Contents | |
| Cartridge Quantity | 2 |
| Inner Cartridge | Included |
| Outer Cartridge | Included |
| Filter Media Grade | 4 oz |
Frequently Asked Questions
Which filter model does the SR300 set fit?
This set is specified for the Sta-Rite System 3 S7M120. Confirm S7M120 on your filter tank label and match the existing inner and outer cartridge arrangement before ordering.
What is included in this cartridge set?
The Darlly SR300 set includes one inner cartridge and one outer cartridge. The listing is for replacement cartridges; retain your compatible filter tank and its serviceable hardware.
How do I install the replacement cartridges?
Follow the Sta-Rite filter manual. Shut off the pump, isolate its power and release all filter pressure before opening the tank. Seat both cartridges as directed and inspect the tank seal and closure before restarting the system.
Match Your System 3 Cartridge Set
Confirm the S7M120 tank model, then order the Darlly SR300 inner and outer set together.
- Genuine Darlly cartridges
- Inner and outer set
- Ships free from the USA
- Spa techs on support
Additional Info
| Category | Parts Pool Parts Filter Parts |
| SKU | PST-17-777-2700 |
| MPN | SR300 |
| Manufacturer | Darlly Filtration |
| Weight | 30.2 lb |
Let customers speak for us
All I can say is great customer service. Their products are good too
We had the older version and this dropped right in. Great buy!
I can’t wait for my mini Goldendoodle to be buzz for Halloween! It’s not bulky and small that it won’t bother him. He’s 32 lbs and I got the M/L
No issues with it. I received great customer service ensuring I chose the right thing and shipping was really fast.
Can not say enough about the Balboa retro fit system. I’m no expert, but I watched a you tube video and installed it myself. Hot tub is 14 years old and is up and running like new. Very pleased with my purchase. Thank you.
The process was smooth and lights arived as expected. Everything test out in good working order.
Needed to replace the control overlay on our Nordic Impulse hot tub, but could not find out the make or model number of the actual control panel on our tub. By taking measurements and photos or our actual control panel button positions and functions, I was able to narrow down the options. I ordered this overlay as the button positions seemed to be in the right positions, even though the overall size was smaller than the control panel. The overlay works, in that all buttons and functions are in the right place, and the overlay seems to have adhered well to the panel. It is not a perfect match, as it is smaller overall than it should be. But I am happy with the result and will buy an additional identical overlay as a backup in case this one, too, deteriorates at some point. Took a lot of detecting, but the result is successful!
This costume is legit. It has the sparkle, glittery sheen to it like the one used on screen! Very happy with it!!
Excellent service!
PST was great at communicating the status of my order throughout the various stages. I actually did encounter a shipment issue and they handled it without issue. I will be doing business again with them.
PST was great at communicating the status of my order throughout the various stages. I actually did encounter a shipment issue and they handled it without issue. I will be doing business again with them.
as described, fast shipping
My wife has RA and is always uncomfortable. Our hot tub heater failed and all the local shops were not able to assist until November. I was able to order an exact replacement part which was delivered within 3 days the hot tub was up and functioning in three days. I was very impressed with the quality and service.
Good quality just ordered wrong size and also need thicker cover
Fit perfectly, and fast shipping
