Home / Check Valve, TD150P Zoom Check Valve, TD150P Be the first to review this product SKU: TD150P 1.5" plastic trap door style check valve. These are a low cost alternative to our billet aluminum TD150 and TD150-OR models. $74.00 Qty: Add to Cart | Add to Compare Product Description Product's Review Product Tags Product Description Details 1.5" plastic trap door style check valve. These are a low cost alternative to our billet aluminum TD150 and TD150-OR models. Product's Review Write Your Own Review Only registered users can write reviews. Please, log in or register Product Tags Add Your Tags: Add Tags Use spaces to separate tags. Use single quotes (') for phrases. CMS tab