The Snyder 18" Vented Threaded Tank Manway (part 34300012) is a polyethylene (PE) manway lid sized for an 18-inch opening, with a 15" access hole. It uses a threaded design and includes venting, as indicated in the manufacturer's part listing.
Fit and Ordering
We stock this manway as a maker-confirmed Snyder part. As with any lid or manway, match the opening size and thread style on your tank before ordering — measure the existing ring or check your tank's documentation, and call us at 866-418-1777 if you'd like us to confirm fit for your tank before you buy. Shipping is quoted separately; for a live quote, use our freight cost estimator.
