770.767.3525
Waterson Glass Door Hinges for Frameless Glass Doors: Models, Specs and How to Choose
Waterson's K51G is a hydraulic, self-closing hinge built for frameless glass doors. The closing spring and the hydraulic damper sit inside the hinge barrel, so the door closes on its own and slows down near the end without a floor spring, an overhead closer, or any core drilling into the slab.
The series comes in three mounting styles: glass to wall (K51GWL), glass to glass (K51GG) and glass to frame (K51GM). Each one ships as a set of 2, 3 or 4 hinges, depending on how tall and heavy the door is. You'll typically see them on office partitions, conference rooms, clinic entrances, retail storefronts, hotel interiors, frameless shower enclosures and glass pool gates.
This guide lists every model in the current K51G catalog, with the door sizes, weight limits, glass thickness and functions for each one.
How to read a K51G model number
Every model code follows the same pattern, so once you know it, you can tell what a hinge set does just from its name. Take K51GWL-600-D3 as an example:
| Part | Example | Meaning |
|---|---|---|
| Material | K51 | Stainless steel, Type 304 standard |
| Mounting style | GWL / GG / GM | Glass to wall / glass to glass / glass to frame |
| Hinge height | 600 / 450 | 6 inch / 4.5 inch hinge body |
| Function | B / D | B = hydraulic hybrid (self-closing with damping); D = hydraulic plus 90° hold open |
| Hinges per set | 2 / 3 / 4 | Number of hinges in the set, chosen by door size and weight |
So K51GWL-600-D3 is a three-hinge, glass to wall set with 6 inch hinges and a hold-open function. Inside each set, the hinges carry different internal functions (for example closing force adjustment, swing speed adjustment, or hold open) that work together, which is why Waterson sells them as matched sets rather than single pieces.
Glass to wall hinges (K51GWL)
Use these when the glass door swings off a wall, column or masonry jamb. The catalog asks for a wall width of at least 1-1/2 in (38 mm) at the mounting point.
| Model | Hinges | Max door size (H) | Max door weight | Hold open |
|---|---|---|---|---|
| K51GWL-600-B2 | 2 | 6 ft | 150 lbs | No |
| K51GWL-600-D2 | 2 | 6 ft | 150 lbs | 90° |
| K51GWL-600-B3 | 3 | 7 ft | 260 lbs | No |
| K51GWL-600-D3 | 3 | 7 ft | 260 lbs | 90° |
Shared specs for the whole K51GWL line:
- Glass thickness: 5/16 in to 1/2 in (8 to 12 mm) per the product listings
- Material: SS304, with SS316 marine grade available as an option
- Stock finishes: Satin Stainless Steel (US32D) and Flat Black (US19)
- Door stop options: 90° or 110°
Browse the full set on the glass to wall hinges collection page.
Glass to glass hinges (K51GG)
This is the one for all-glass layouts, where the swinging door hangs off a fixed glass panel and there's no wall or frame to anchor into. The hinge clamps onto both panels through black gaskets, so neither the floor nor a metal frame gets involved.
| Model | Hinges | Max door size (W x H) | Max door weight | Hold open |
|---|---|---|---|---|
| K51GG-600-B2 | 2 | 4 ft x 6 ft | 150 lbs | No |
| K51GG-600-D2 | 2 | 4 ft x 6 ft | 150 lbs | 90° |
| K51GG-600-B3 | 3 | 4 ft x 7 ft | 260 lbs | No |
| K51GG-600-D3 | 3 | 4 ft x 7 ft | 260 lbs | 90° |
You can mount on the fixed panel first, hang the swing panel, check alignment, then tighten and fine-tune tension and speed with the included hex keys. The glass to glass collection page also has combo listings for shower enclosures (B2/D2 and B3/D3 sets).
Glass to frame hinges (K51GM)
Pick K51GM when the glass door hangs in a metal or wood frame. It uses a shorter 4.5 inch hinge body and is the only K51G style offered as a 4-hinge set, which makes it the go-to for 8 ft doors. The frame needs to be at least 1-3/4 in (40 mm) thick.
| Model | Hinges | Max door size (W x H) | Max door weight | Hold open |
|---|---|---|---|---|
| K51GM-450-B2 | 2 | 4 ft x 6 ft | 150 lbs | No |
| K51GM-450-D2 | 2 | 4 ft x 6 ft | 150 lbs | 90° |
| K51GM-450-B3 | 3 | 4 ft x 7 ft | 260 lbs | No |
| K51GM-450-D3 | 3 | 4 ft x 7 ft | 260 lbs | 90° |
| K51GM-450-B4 | 4 | 4 ft x 8 ft | 330 lbs | No |
| K51GM-450-D4 | 4 | 4 ft x 8 ft | 260 lbs | 90° |
Shared specs for the K51GM line:
- Glass thickness: 5/16 in to 1/2 in per the product listings
- Material: SS304, SS316 as an option
- Stock finishes: US32D and US19
- Door stop options: 90° or 120°
One practical note for wood frames: wood moves with humidity, so reinforce the hinge mounting points and avoid over-clamping the glass edge. More detail is on the glass to frame collection page.
Finishes, materials and options
All K51G hinges start as Type 304 stainless steel. For pool gates, coastal sites and exterior entrances, the 316 marine grade option is the safer choice, and a weather-resistant cap is available for outdoor and wet areas.
| Finish code | Name | Process | Availability |
|---|---|---|---|
| 630 (US32D) | Satin Stainless Steel | Brushed stainless | Stock |
| 631 (US19) | Flat Black | Powder coating | Stock |
Door stops mount on the hinge barrel to limit the swing. A 2-hinge set needs one door stop, while 3 and 4-hinge sets need two. They come in WP01 (90°), WP03 (110°) and WP02 (120°) versions.
The catalog also describes two operating modes by glass thickness: 5/16 in to 9/16 in works in self-closing mode, while 9/16 in to 27/32 in runs as a heavy-duty, non-self-closing hinge.
Durability, ADA and warranty
Waterson rates the K51G hinges for 1,000,000 open-close cycles under ANSI/BHMA A156.17 testing. The sets are listed as ADA compliant, with an opening force under 5 lbs and a closing time over 5 seconds, which matters for clinics, offices and any public-facing entrance.
The hinges are designed to operate between 0° and 120°. They can physically open further, but regular use past 120° wears the internal mechanism faster and isn't covered under warranty. If people tend to push the door wide open, a door stop is cheap insurance.
For warranty terms, go by the official Waterson closer hinge warranty PDF. The March 2026 catalog lists a 3-year warranty for glass door hinges, while some product pages mention 5 years, so it's worth confirming the coverage for your exact model before you order.
FAQ
Which Waterson model works best for a heavy commercial glass door?
For doors up to 7 ft and 260 lbs, any 3-hinge set (K51GWL, K51GG or K51GM) will do, depending on what the door mounts to. For 8 ft framed doors, the K51GM-450-B4 handles up to 330 lbs. Add the D version if the door needs to stay open at 90° during business hours.
Do I need a floor spring or overhead closer with these hinges?
No. Self-closing and soft-close damping are built into the hinge, so there's no floor cutting and no closer arm across the top of the glass. That's a big plus for retrofits and tenant fit-outs where the floor is already finished.
Can I adjust the closing speed after installation?
Yes. Closing force and swing speed are adjusted with hex keys while the door stays hung. Waterson's adjustment guide walks through it.
Are Waterson hinges good for outdoor glass doors and pool gates?
They are rated for outdoor use. For exterior or poolside installs, choose the 316 marine grade option and the weather-resistant cap.
How do Waterson hinges compare to other frameless glass hinge brands, like CR Laurence?
We'd rather not make claims about another brand's products here. The fairest way to compare is spec by spec: maximum door weight per set, glass thickness range, whether self-closing and damping are both built in, hold-open options, cycle rating, ADA compliance, finish options and warranty length. The tables above give you Waterson's side of that comparison.
Where can I buy premium frameless glass door hinges in the United States and Worldwide?
Waterson sells the full K51G range online through closerhinge.com and ships to all U.S. states as well as internationally. For larger projects, custom finishes or spec help, you can request a quotation, email hinges@watersonusa.com or call +1-770-767-3982.
Useful resources before you order: