Franklin Fueling Systems · Sumps & Chambers
Optimum Fusion Tank Chambers
1400 mm electrofused PE chambers with deep or shallow bases and large or small riser openings
Overview
Optimum Fusion (OCH series) chambers are 1400 mm polyethylene tank chambers for sites where groundwater must never reach the tank top. Base and riser arrive as separate parts. The pipework is fitted into the open base first, which gives the installation crew room to work, and the riser is then electrofused onto it.
The weld is made with standard UPP electrofusion equipment in approximately six minutes, using the OCH-1400-H welding harness that is ordered separately. After cooling, base and riser form one homogeneous unit with no bolts, no foam gaskets and no mechanical joint, and the chamber is vacuum tested to confirm it is leak-tight. Lids close with toggles (OCH-1400-T1 included), and a mechanical toggle is available.
Four models cover different burial depths and collar sizes. The large-bore OCH-1400-D (deep) and OCH-1400-S (shallow) have a 980 mm neck opening and a watertight large-bore lid, and their bases suit square collars up to 970 mm or round collars up to 1150 mm. The Small Riser OCH-1400-DS and OCH-1400-SS have a 780 mm opening and a base that takes larger collars, up to 1270 x 1270 mm square or 1380 mm round. Apex supplies and installs Optimum Fusion chambers in Lebanon, including the electrofusion welding.
Key features
- Riser electrofused to the base in about six minutes with UPP equipment
- No bolt holes or foam gaskets at the riser-to-base joint
- Vacuum tested after welding to confirm a leak-tight chamber
- Deep and shallow bases; pipework goes in before the riser is fitted
- Large-bore models with a 980 mm neck, Small Riser models with 780 mm
- Small Riser base fits collars up to 1270 x 1270 mm square or 1380 mm round
- Toggle-latched watertight lid, with a mechanical toggle option
- Accepts UPP electrofusion entry seals for a fully welded system
Specifications
Optimum Fusion Tank Chambers technical data
| Model | Description | Size (mm) | Neck opening (mm) | Overall height (mm) | Mass (kg) |
|---|---|---|---|---|---|
| OCH-1400-D | Deep burial, large bore | 1400 x 1616 | 980 | 1176–1616 | 92 |
| OCH-1400-S | Shallow burial, large bore | 1400 x 1266 | 980 | 826–1266 | 80 |
| OCH-1400-DS | Deep burial, small bore | 1400 x 1616 | 780 | 1176–1616 | 86 |
| OCH-1400-SS | Shallow burial, small bore | 1400 x 1266 | 780 | 826–1266 | 80 |
Figures from the manufacturer's published documentation. Confirm the final configuration with Apex at quotation stage.
Questions
Optimum Fusion Tank Chambers: common questions
- How long does the riser weld take?
- Franklin quotes approximately six minutes with UPP electrofusion equipment. The OCH-1400-H welding harness is required and is ordered separately.
- What is the difference between the large-bore and Small Riser versions?
- Large-bore models (OCH-1400-D and -S) have a 980 mm neck opening. Small Riser models (OCH-1400-DS and -SS) have a 780 mm opening and a base that fits larger tank collars, up to 1270 x 1270 mm square or 1380 mm round.
- How deep can the chamber go?
- Deep models adjust between 1176 and 1616 mm overall height; shallow models between 826 and 1266 mm.
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