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Pro One USA

PROONE-G:9-4 Pro One USA Gravity Water Filter 9" Filter Element, All-in-one Filter Technology, No Priming Required, Cleanable, Reusable 4units/pack

Regular price $298.95 USD
Regular price Sale price $298.95 USD
Sale Sold out
Shipping calculated at checkout.

Made in the USA, the ProOne-G:9-4 Gravity Water Filter is a testament to superior water purification. It features all-in-one filter technology, ensuring efficient removal of over 200+ contaminants, including heavy metals and fluoride, without the need for additional filters. Each filter is cleanable and reusable, measuring 9 inches in height and 2.75 inches in diameter, with a lifespan of up to 6 months or 1200 gallons.


  • 4 x ProOne G2.0 9" Gravity Water Filter Elements
  • User Manual
  • Warranty Information

Fit Compatibility:

  • Fits ProOne® Big+ & Propur King
  • Compatible with Berkey (Royal, Imperial & Crown), and other large gravity water filter systems
  • For daily use
ProOne® G2.0 Series water filter is NSF certified

Tested by a certified independent lab to NSF/ANSI Standards 42, 53, P231, P401, and P473. Please visit our lab reports for complete details.

Note: This Gravity Water Filter Replacement comes in 4 pack. Also available in 1 pack, 2 pack, and 3 pack.

Benefits & Features

✅ Healthy Hydration: Reduces over 200+ contaminants for safer drinking water.
✅ Eco-Friendly Design: Cleanable and reusable, reducing waste.
✅ Convenience: No priming required, easy to use and maintain.
✅ Versatile Compatibility: Fits various gravity filtration systems including ProOne® Big+ & Propur King.
✅ Certified Quality: NSF/ANSI-42 certified for material requirements.

Product Specifications

Item Dimensions: 9" Height x 2.75" Diameter
Item Weight: 5.52 lbs (Shipping Weight)
Item Color: White
Filter Option: 4 ProOne G2.0 9" Filter Elements
Recommended Replacement: Every 6 months or 1200 gallons per filter
Certifications: NSF/ANSI Standard 42

Manuals & Documentation

Lab Report,

How We Ship Your Order

Order Confirmation: As soon as you place your order, you will receive an order confirmation email automatically. This confirms we received your order and pre-authorized your credit card.

We Process Your Order: We work in the background to match your order with the closest available inventory to you. We work with and confirm availability with our warehouse network, and we get a confirmation the order has shipped. This process typically takes 3-5 days but can be several weeks (if your item is made to order).

We Navigate & Keep You Informed: We make sure you receive your orders as smoothly as possible. If there are any challenges with stock availability, shipping times, shipping carrier cost changes, damages that occur during shipping, or anything else, we are here to help. We will reach out to you by email, sms or phone to make sure you are always informed.

We Provide Shipment Tracking: All orders will be shipped via small parcel or shipped via freight companies that specialize in larger products. As soon as your order has shipped, tracking information will be sent via email or sms. We aim to provide tracking within 3 days from the time when we receive the order from you.

Your Order is Delivered: Once your shipment arrives, inspect the packaging before accepting and signing for delivery whenever possible.

If anything does arrive damaged, take photos and reach out to us immediately. Keep everything together (do not discard packaging or shipping materials) and wait for instructions so your order can be returned and exchanged for an undamaged and working product.

What if I need to cancel?

  1. Cancellations of Made-to-Order Items: Once confirmed, an order for a made-to-order item may be considered final and partially (up to fully) non-refundable. 
  2. Cancellations of Available Items: If the item you ordered is available for shipping, it may ship within 24-48 hours of your order. If an item is already shipped, the order can not be canceled. We will help you return the item, but restocking fees may apply if canceled after shipping. Read the full policy.
  3. Cancellations of Preorders: If an item is not currently available, but we keep your order in place as a pre-order. You are welcome to cancel; however, please note that fees will apply as costs are incurred. 

Pricing Matching & Bulk Discounts

Price Matching:
When we decide what products to make available online, we compare ourselves with others in the marketplace so that we can ensure we offer some of the most competitive prices online.

While we may not beat everyone if you are buying one item from us, we always do our best to provide you with the best value we can offer.

If you do find a better price, we’ll do our best to meet or beat their offer when possible! Here are a few limitations that we will not attempt to match;

  1. The competitor must have the item available.
  2. The competitor can not be a discounter or auction website.
  3. The competitor must be an Authorized Retailer of the product.

We may not allow rebates or promotions to be combined with items we discount for price matching.

Bulk Discounts:
Looking to place a larger order but need better pricing? Reach out to our team to discuss your needs and we will be happy to provide you a full estimate with the maximum discount applied based on your order.