Crystal Quest Ultimate Sump O-Ring (3-Pack) – BPA-Free, Eco-Friendly, Made in USA – Ideal for Whole House & Under Sink Water Filter Replacement - Multiple Sizes


Upgrade your water filtration system with our durable, eco-friendly sump O-rings. Made from stainless steel and BPA-free materials, they provide a secure, leak-proof seal for most under-sink and countertop filters. These O-rings are ISO Certified, ensuring top-quality performance, high pressure resistance, and long-term reliability. Compatible with Crystal Quest systems, they support safe, sustainable filtration in your home. Fresh Water Begins Here. 

• Safe, toxin-free O-rings crafted from sustainable materials. 
• Made with stainless steel and rubber for a strong, long-lasting seal. 
• Compatible with most under-sink, countertop, and whole-house water filters. 
• Built to meet strict quality and safety standards for reliable filtration. 
• Proudly American-made, supporting local jobs and superior manufacturing.


We are a trusted manufacturer of high-quality water filtration products, serving residential, commercial, and industrial markets for over 30 years. Our commitment to innovation, quality, and customer satisfaction has made us a leading name in water filtration. Proudly built in the USA, we offer cost-effective and reliable solutions to meet various water treatment needs.

Why Choose Us?

  • Decades of Expertise – Over 30 years of experience in water filtration manufacturing

  • Reliable, High-Quality Products – Designed for long-term performance

  • Versatile Solutions – Serving homes, businesses, and industries

  • Customer Support – Assisting customers in finding the right filtration system

  • Wide Range of Products – Tailored solutions for specific water concerns

We offer a variety of secure payment options to ensure a seamless and protected checkout experience. The following payment methods are accepted:

  • Credit & Debit Cards: Visa, Mastercard, Discover, Amex and Diners Club

  • Digital Wallets: Apple Pay, Google Pay

  • Online Payment Services: PayPal, Venmo

For your security, we do not accept cash, personal checks, money orders, or any other unsupported payment methods. All transactions must be completed through eBay’s secure payment system to protect both buyers and sellers.

If you experience any issues during the payment process, we recommend checking eBay’s customer support for troubleshooting or reaching out to us for further guidance.

    • Services: We ship via USPS, and UPS to home and business addresses.

    • Signature: No signature required

    To ensure customer satisfaction, we accept returns and exchanges under the following conditions:

    • Returns for refunds are accepted only on new, unused items in original packaging within 30 days of purchase.

    • A 30% restocking fee applies to all approved refunds.

    • Return shipping costs are the buyer’s responsibility.

    • Exchanges are accepted for defective products, product upgrades, or when working directly with us to find the best filtration solution.

    • Non-returnable items: Custom orders, special-order items, opened filter cartridges/membranes (for safety reasons).

    • Return Authorization: All returns must have an RMA number (contact us before sending any returns). Returns received without authorization may not be processed.

    We are committed to providing high-quality water filtration solutions and excellent customer service. If you have any questions about our products, shipping, or return policies, please feel free to contact us.

We're here to help!

Feel free to contact us for any support you may need! You can reach us through the eBay messaging service, by phone, or through our website. We're always happy to assist you!