With the savings available from the Low Head versions of AquaBead and AlphaONE filters, you may find yourself wishing you had one of these Low Head models. But those savings are certainly not worth buying a whole new filter! Enter the LH Backwash Valve! With this retrofit backwash valve, you can easily and quickly convert an AlphaONE or AquaBead filter into an AlphaONE LH or AquaBead LH filter. GC Tek GCTek Aqua Bead Alpha ONE GC Tek products are not eligible for order discounts. Adding GC Tek products to your order will void coupons used on that order.