Concrete Tumbling Bay Junction

Specifications

Product Type: Concrete Tumbling Bay Junction
Nominal Diameters: 225mm - 600mm 
Effective Lengths: 1250mm - 2500mm
Approx Weights: 125kg - 1200kg

This Tumbling Bay junction is designed to insert either a 45 degree (Oblique) or 90 degree (Square) junction into pipeline constructed from CPM's range of Flexible Jointed Concrete Pipes.

Product Features at a Glance:

• Spigot & Socket design
• Integral Seal jointing
• Quicker installation
• Manufactured to BS EN 1916 Class 120
• Kitemarked to BS 5911

The effective length and approximate weight of the this junction is entirely dependent on the diameter chosen. Please consult the table below for specific dimensions of the size options available for this pipe bend.

Manufacturers Advice: Please read the following installation advice regarding the two types of seal this pipe bend will be supplied with depending on the diameter size chosen:-

Rolling Ring Joints: Lubricants MUST NOT be used where rolling joint rings are supplied. When the spigot is connected to the socket, the seal intentionally rolls and creates a broad contact area enabling an excellent joint to be formed.

Integral Seal Joints: The use of CPM lubricant is strongly recommended with the CPM integral jointed pipe system. Non-compliance may result in installation problems for which JDP nor CPM can accept no responsibility.

Tumbling Bay Junctions are ideal for situations where there is a significant difference in level between the incoming pipe and the invert level of the manhole. To avoid having to excavate to the full depth for the incoming pipe, a tumbling bay junction can be used to form a ‘Dropshaft’ connection.

This is where the incoming pipe line continues through into the manhole chamber at its current level and is fitted with a stopper, enabling maintenance and inspection access as required. The Tumbling Bay Junction is then used to divert the water flow down and into the chamber at the invert level via a suitable configuration of vertically installed pipes and pipe bend.

Marshalls CPM precast concrete pipes have a design life of 120 years, ensuring that lifetime costs are kept to a minimum. All precast concrete pipes are manufactured to class 4 (DC4) sulphate resistance in accordance with the recommendations of BRE Special Digest.

 Key Features of CPM Concrete Products:

• Quality - Precast concrete drainage products are manufactured in accordance with the relevant BS EN 1916/7, BS EN 5911 and CE marked where applicable. Goods are certified by Quality Assessment under the Kitemark Scheme and ISO 9001:2015.
• Sustainability - Concrete pipeline systems are one of the most sustainable options available, they are manufactured from responsibly sourced materials, and can be made using recycled aggregates and cement replacements.
• Proven Strength - They have a proven life of over 120 years, in normal groundwater conditions, are not weakened by fire or moisture and do not lose their shape. They are resistant to DC4 and impacts such as jetting, so blockages can be cleared easily.
• Installed Cost Savings - Precast concrete pipes are rigid structural elements that do not always require a full granular surround, saving time in bedding and compaction. Excavated material can be reused and imported granular material can be reduced to a minimum.
• Durability - Due to the inherent strength and durability of the Marshalls CPM precast concrete products, they are highly abrasion and corrosion resistant and don't lose strength over time.
• Design Flexibility - Precast concrete drainage products can be used for a number of purposes, including sewerage and sustainable urban drainage systems (SuDS) applications such as stormwater attenuation and storage.
• Water Tightness - Concrete pipes and manholes are designed to be watertight and are tested to pressure levels equivalent to a 5 metre head of water.
• Fire Resistant - Concrete is naturally fire resistant. 

Please Note: All dimensions and weights are approximate as concrete product dimensions can have slight variations due to their manufacturing process. Customers should ensure that lifting equipment has sufficient capacity to allow for variations. All images shown are used for illustration purposes only and may differ from the actual product supplied.