Pentair | 274494Z O-ring-TR Valve Union Replacement
Pentair | 274494Z O-ring-TR Valve Union Replacement
Pac-Fab Hi-Flow Valve Adapter O-ring designed to use with:
- Pentair FNS, Nautilus, Nautilus Plus D.E. and TR100C, TR140C, Triton II, Triton C, Triton C-3 sand pool/spa filters
- Also compatible with Pentair Minimax NT STD, NT LN and NT TSI pool/spa heaters
- Also fits Pentair HiFlow, FullFlow and Push Pull pool/spa valves

Pool Supply Store
Limited Time Sale
Find the best pool equipment to complete your entire pool system. The lowest possible prices offered at fastest shipping.
-
Pentair IC40 Replacement Salt Cell Open Box
Regular price $1,429.00 USDRegular priceUnit price / per -
-
S8M600 Modular Media Filters Replacement Set | Outer & Inner Cartridges
Regular price $900.00 USDRegular priceUnit price / perSold out
What our customers are saying
Quick delivery of my ordered products. Thank you
Quick delivery of my ordered products. Thank you
Patricia S
After researching our pool filter options, we decided to buy the Aquastar PLF35000 that our local pool guy recommended. I reached out before ordering to confirm pricing and availability. Clinton responded promptly (on a weekend) and followed up with sending an invoice that made ordering easier with just one click. Filter arrived as scheduled. From inquiry to install, all was complete within a week! Thanks for the help Clinton.
After researching our pool filter options, we decided to buy the Aquastar PLF35000 that our local pool guy recommended. I reached out before ordering to confirm pricing and availability. Clinton responded promptly (on a weekend) and followed up with sending an invoice that made ordering easier with just one click. Filter arrived as scheduled. From inquiry to install, all was complete within a week! Thanks for the help Clinton.
Jennifer K.
Quick quote, good price and fast delivery
Quick quote, good price and fast delivery
Kent V.
FAQ
Our expert staff answers customer's most asked questions.
How frequently should I clean my filter cartridges?
The cleaning frequency is contingent on your filter's size. As a general guideline, initiate the cleaning process when the filter pressure exceeds the initial pressure by 10 psi. This ensures optimal filtration efficiency.
What are the ideal chemical ranges for my pool?
Achieving a balanced pool involves maintaining a pH range of 7.2–7.8, total alkalinity between 80–120 ppm, calcium hardness at 180–220 ppm, and cyanuric acid (stabilizer) within 30–50 ppm. Chlorine levels should consistently fall within the 1–3 ppm range, by may need to be increased as CYA levels go above 60 PPM.
What is better for my pool and my body: Salt Chlorinator or Chlorine Chemicals?
Opting for a salt chlorinator is a superior choice for both your pool and skin. In addition to cost savings on chemicals, it requires minimal maintenance with a 5-7 year replacement cycle on salt cells. Most salt cells have an operating life of 10,000 hours. Proper maintenance will help extend the life cycle of salt cells. Refer to your owner's manual for cleaning instructions and tips on cleaning Pentair salt cells and products that help keep all salt cells cleaner. Explore our recommended models, Gentle Chlor and IC-40, by following this link.
Learning Center
Blog posts
The latest news and guides making buying and maintaining pool equipment easier.
-
Pentair vs Jandy vs Hayward: Best Pool Filter S...
Swimming pool filter systems have seen three dominant players in the market for decades: Pentair, Jandy, and Hayward. Pentair leads the pack with a 35% market share, and Jandy follows...
Pentair vs Jandy vs Hayward: Best Pool Filter S...
Swimming pool filter systems have seen three dominant players in the market for decades: Pentair, Jandy, and Hayward. Pentair leads the pack with a 35% market share, and Jandy follows...
Learn More -
Warning Signs You Need a New Pool Filter Cartridge
Pool filter cartridges typically last one to three years. However, many pool owners aren't sure about the right time to replace their cartridges. Some people keep them for 3-5 years...
Warning Signs You Need a New Pool Filter Cartridge
Pool filter cartridges typically last one to three years. However, many pool owners aren't sure about the right time to replace their cartridges. Some people keep them for 3-5 years...
Learn More -
Sand Filter vs Cartridge Filter: Real Maintenan...
Pool owners face a crucial choice between sand and cartridge filters that goes beyond initial costs. The maintenance budget often reveals unexpected expenses that affect long-term ownership costs substantially. Sand...
Sand Filter vs Cartridge Filter: Real Maintenan...
Pool owners face a crucial choice between sand and cartridge filters that goes beyond initial costs. The maintenance budget often reveals unexpected expenses that affect long-term ownership costs substantially. Sand...
Learn More