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Description
The Crystal Quest Thunder 4000C is a 14-stage under-sink water filtration system that combines reverse osmosis, ultrafiltration, and ultraviolet treatment to purify drinking water at a single point of use. It is rated for 50 gallons per day.
Highlights
- Combines reverse osmosis, ultrafiltration, and ultraviolet sterilization in one 14-stage system
- Reverse osmosis membrane removes particles as small as 1/10,000 of a micron, including many microorganisms and inorganic contaminants
- Granulated activated coconut shell carbon (GAC) filter cartridge reduces VOCs, pesticides, and industrial solvents
- Includes a complete installation kit: lead-free designer faucet, 3.2-gallon stainless steel pressurized holding tank, tubing, filter cartridges, membranes, and hardware
- Optional exchange cartridges available for fluoride, nitrates, arsenic, and other contaminants
Details
Avermont Direct is an authorized Crystal Quest dealer. This under-sink system installs beneath a kitchen or bar sink to provide filtered, purified drinking water at that single point of use. It's suited to households wanting reverse osmosis, ultrafiltration, and UV treatment together without a whole-house installation.
Need Help?
If you have questions about this product before you order, our team is happy to help.
Email: support@avermontdirect.com
Phone: +1 (844) 455-3695
Hours: Monday–Friday, 9AM–5PM
Live Chat: Available 24/7
| Rated Output | 50 Gallons Per Day (GPD) |
| Filtration Stages | 14 |
| Unit Dimensions | 16"L x 8"W x 24"H |
| Holding Tank | 18"H x 11"D, 3.2 gal (2.0 gal usable capacity) |
| Voltage | 110V standard (220V available on request) |
| Operating Pressure Range | 35 – 60 psi (60 psi optimal); a pump-equipped model is recommended if incoming pressure runs low |
| Series Type | C Series (GAC filter cartridge) |
| Installation Valve | Saddle valve (hard copper plumbing) or T-valve (flex tubing), selected at order |
- Ultraviolet Water Sterilizer stage (304 stainless steel, axial-flow reactor) rated for 99.99% reduction of bacteria, virus, and protozoa without added chemicals
- Optional leak detector/flood-prevention valve available and recommended to help guard against water damage
Shipping
- Orders of $200 or more ship free within the contiguous United States. Orders under $200 ship for a flat $9.99.
- In-stock items (shown as “In Stock” on the product page) ordered before 1:00 PM Pacific Time on a business day typically ship within 1–3 business days. Delivery usually takes 3–7 business days after shipping.
- Backorder, Partial Backorder and Custom Order items are not covered by the 1–3 business day processing time. Their estimated restock or ship time is shown in the stock status on the product page before you order.
- Large items ship by freight and are typically delivered curbside. Smaller items ship by ground carrier such as FedEx or UPS.
- We ship to the 48 contiguous states. We do not ship to Alaska, Hawaii or P.O. boxes.
- Please inspect your delivery on arrival and report any concealed damage or missing parts within 24 hours.
Returns
- Returns can be requested within 30 days of delivery. Items must be unused, uninstalled, in new resalable condition and in their original packaging, including the pallet if delivered on one.
- Approved returns are subject to a 15% restocking fee, and return shipping costs are the customer’s responsibility unless the return is the result of our error.
- Installed or used products, custom and made-to-order items, clearance or final-sale items, and replacement parts and accessories are not eligible for return.
Full Shipping Policy Full Return Policy Questions? +1 (844) 455-3695