https://www.purewaterproducts.com/products/fr002

Recommended for 25 gpd or 36 gpd membrane.

https://www.purewaterproducts.com/products/wh424

Will handle flow rates in the 25 gallons-per-minute range and higher with large particles.

https://www.purewaterproducts.com/sand-trap

Maximum flow rates vary from more than 25 gallons per minute for the largest unit down to a maximum of The largest Sand Trap model will handle flow rates in the 25 gallons-per-minute range and higher with Will handle flow rates in the 25 gallons-per-minute range and higher with large particles.

https://www.purewaterproducts.com/articles/chemical-feed-tables

The minimum retention time for the above is 20 minutes, with the exception of iodine which needs 25 minutes retention time for the above is 20 minutes, with the exception of potassium permanganate which requires 25

https://www.purewaterproducts.com/docs/5600-multi-media-filter-media-loading-instructions

Third Layer — 25 pounds of #30-40 garnet. Top Layer — 25 pounds of anthracite.

https://www.purewaterproducts.com/products/fc409

Nominal 25

https://www.purewaterproducts.com/articles/chlorine-dosage

A chart detailing quantities of chlorine needed to disinfect water.

25 ppm* for 24 hours 25 ppm* for 24 hours

https://www.purewaterproducts.com/articles/depth-filters

A brief overview of "depth" sediment filters.

3rd Layer - 25 micron

https://www.purewaterproducts.com/products/uv005

25"

https://www.purewaterproducts.com/products/uv034

25"

https://www.purewaterproducts.com/products/fc412

Nominal 25

https://www.purewaterproducts.com/products/uv033

25"

https://www.purewaterproducts.com/products/uv004

25"

https://www.purewaterproducts.com/products/uv006

25"

https://www.purewaterproducts.com/products/uv035

25"