Grex A150026 - Air valve connector Grex from $7.38 $9.00 Qty. Add to Cart SKU: GRX-A150026 This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Genuine Grex replacement part A150026 - Air valve connector. For Grex Models XA. Chart referance number 15. Tweet