When looking at flow rates, please consider the following,
  1. Is the output of the filter rated in gallons per hour or gallons per day? If rated in gallons per hour, that usually indicates a need to top off or refill the upper container continuously to maintain what is referred to as maximum water head pressure. In reality, most people don’t have the time to stand by their gravity water system and keep filling the upper container. Propur™ has taken a realistic approach in establishing our flow rates based on gallons per day. That is, you fill the upper container once and walk away.
  2. System configuration and the # of holes for filters.. Alternative brands of gravity systems offer additional holes in the upper container and claim you can increase flow rate by adding filters. While generally speaking this is true -  have you ever tried watering your lawn running too many sprinkler heads at the same time. What happens?  You get a trickle of water coming out of each sprinkler head. You’re better off running fewer heads to maintain the water pressure you need. Same thing with too many filter elements in your upper container. Your upper container can only provide a certain amount of water head pressure depended on the size system you have. In reality, too many filters in the upper container may in fact slow down the flow rate.  
  3. Propur™ systems are engineered for maximum flow rate performance based on the water storage capacity and maximum water head pressure. That’s why we offer different size systems that are configured with different number of filters.
  4. Please visit our “filters” tab in our website for flow rate numbers on the PropurProBlack-D™ and ProOne™ water filter elements.

ProOne™ Flow Rates
Remember the ProOne™ filter is 2 filters in one and doesn’t require an add-on filter for fluoride or heavy metal reduction. Most alternative filters either don’t offer an add-on fluoride filter option or don’t offer flow rate information that includes add-on fluoride filters. Consider this when comparing flow rate information. 
 

ProOne™ Gal/Day

TRAVELER

BIG

KING

Minimum filter configuration
Maximum filter configuration

INCLUDES FLUORIDE FILTER

3.25 (1)
3.25 (1)

 

12.00 (2)
22.25 (3)

 

15 (2)
30 (4)

 

Advantage of Conditioning vs Priming
The purpose of conditioning or priming water filter elements is to replace the air within the pores of the filter element with water so that with each water drop going into the filter element, there’s a water drop going out. With priming, you force water thru the stem of the filter element until water begins to bead up on the outside surface. However you must have water pressure from a faucet to do this and if the water source you’re using is either contaminated or undesirable, then you’re putting that water into your good water storage in the lower container. Propur™ water filter elements including the ProOne™ use a safer method called conditioning. With conditioning, you don’t need a faucet to prime your filter element. You merely take water from your source whether tap, river, lake, stream, pond or rainwater and merely fill the upper tank of your Propur™ system allowing gravity to pull water thru the filter elements. In this way, there is no risk of contaminated or undesirable water getting into the lower container of your gravity system and into your drinking glass. You may find the first cycle of water with this process takes longer however over the next couple of cycles, your flow rate will increase noticeably
to the normal flow rate.

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