When you are deciding where to spend money in the deck hardware seating covers part of a boat refresh, two upgrades stand at very different ends of the list: the Boat Marine Waste Deck Fill 2in 1.5in 316 Stainless Steel Keyless Cap Hardware and the 2 NEW Millennium Marine B-100 Boat Seat Gray Model. One is a compact stainless fitting, and the other is a pair of full boat seats. The real question is which one solves the more urgent problem first: a corrosion-prone deck fitting or uncomfortable seating.
Quick Verdict
Choose the Boat Marine Waste Deck Fill when you want a lower-cost hardware upgrade: $45.49. Choose the 2 NEW Millennium Marine B-100 Boat Seat Gray Model when you need two comfortable seats for passengers: $220.00. The deck fill is a small, focused purchase; the seats are a larger, comfort-driven purchase.
Comparison
| Waste Deck Fill Cap | Millennium Marine B-100 Seat Pair | |
|---|---|---|
| Price | USD 45.49 | USD 220.00 |
| Price bar | ||
| What you get | One 316 stainless steel waste deck fill cap | Two gray Millennium Marine B-100 boat seats |
| Main strength | Corrosion-resistant stainless hardware | Passenger seating comfort |
Where Each One Wins
The deck fill wins on price and simplicity. It uses a keyless cap, so there is no separate key to keep track of, and it costs much less than the seats.
The seats win on passenger comfort and seating capacity. The pair gives you matching gray Millennium Marine B-100 seats, which directly addresses the problem of worn or uncomfortable seating. The deck fill, by contrast, does not address seating comfort.
Product Notes
Boat Marine Waste Deck Fill 2in 1.5in 316 Stainless Steel Keyless Cap Hardware

This is the smaller, lower-priced upgrade in the comparison. The 316 stainless steel construction is the main reason to choose it: the material is durable and corrosion-resistant, which matters in a marine setting. The keyless cap design also removes the hassle of tracking a separate key. If your deck hardware is showing signs of wear, this is a straightforward replacement part. The limitation is that it is a single waste deck fill cap. If you need to update several fittings or also want new seating, this one item only covers the fill cap portion of the refresh. In that sense, it is a narrow purchase: it fixes one specific hardware point rather than improving the overall comfort of the boat.
2 NEW Millennium Marine B-100 Boat Seat Gray Model

This is the larger, comfort-focused purchase. You get a matching pair of gray Millennium Marine B-100 seats, so the refresh can cover more than one seating position at once. The gray color is a neutral choice, and the B-100 model number makes it easy to identify the specific seat you are matching. This is the product to choose when the main complaint on the boat is seating comfort. The limitation is the price: this pair costs $174.51 more than the deck fill cap, so it is a much bigger commitment. There is no warranty attached, which means you are accepting it as-is. If the existing seats are still usable, the extra money might be better spent elsewhere.
Final Choice by Use Case
Need to replace a corroded or worn deck fitting without spending much? Go with the Boat Marine Waste Deck Fill 2in 1.5in 316 Stainless Steel Keyless Cap Hardware. Need better seating for people on board? Go with the 2 NEW Millennium Marine B-100 Boat Seat Gray Model. If both upgrades are on your list, start with the lower-cost deck fill and move to the seats when you are ready for the bigger investment.