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BSP Thread Information

What are BSP thread sizes?

British Standard Pipe (BSP) thread is a standard thread type used extensively across the globe for plumbing connections (but not in North America).

The standard defines the number of threads per inch (pitch) as well as the angle that each thread is engineered to. BSP threads have rounded valleys and troughs with a 55 degree pitch (this is known as Whitworth type).

BSP sizes are always in imperial measurements and some have commonly metricised names. The table below summarises BSP sizes to help with general identification. Major diameter is slightly less than the actual outside diameter of the threads. Minor diameter is the measurement of the inside of a female threaded connection, from thread to thread.

There are two types of BSP threads; Tapered (BSPT) and parallel (BSPP). The vast majority of BSP threads for water fittings are parallel.

BSP SizeAlso Known AsActual Diameter (Imperial)Actual Diameter (Metric)
1/8″ 0.35 inch9mm
1/4″ 1/2 inch12mm
3/8″ 6/10 inch15mm
1/2″15 BSP3/4 inch19mm
5/8″18 BSP  
3/4″20 BSP1 inch25mm
1″25 BSP1 & 1/4 inch31mm
1 & 1/4″ 1 & 2/3 inch40mm
1 & 1/2″ 1 & 3/4 inch45mm
2″ 2 & 1/4 inch57mm
2 & 1/2″ 2 & 7/8 inch73mm
3″ 3 & 1/3 inch85mm
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Choosing the Right Water Storage Tank: A Guide to Drayton Tanks


In a world where water scarcity is becoming an increasingly pressing issue, the importance of effective water storage cannot be overstated. Whether you’re a homeowner, a business owner, or a municipality, having a reliable and efficient water storage solution is crucial. At Drayton Tanks, we understand the significance of sustainable water management, and our range of water storage tanks is designed to meet diverse needs while prioritizing durability, efficiency, and environmental responsibility.

Section 1: The Importance of Water Storage Tanks

Water storage tanks play a pivotal role in ensuring a consistent and reliable water supply. They serve as reservoirs for harvested rainwater, emergency water reserves, and storage for water from other sources. In times of drought, natural disasters, or disruptions in the water supply, having a well-designed water storage system becomes invaluable.

Section 2: Types of Water Storage Tanks

At Drayton Tanks, we offer a variety of water storage solutions to cater to different requirements:

a. Polyethylene Tanks: These tanks are known for their durability, corrosion resistance, and light weight. They are suitable for both residential and commercial applications.

b. Steel Tanks: Robust and long-lasting, steel tanks are ideal for industrial and agricultural use. They are often used for storing large volumes of water and are known for their strength and reliability.

c. Fiberglass Tanks: Fiberglass tanks are corrosion-resistant and offer a high level of structural integrity. They are commonly used for underground storage and are well-suited for industrial and agricultural applications.

Section 3: Features of Drayton Tanks

a. Quality Materials: Our tanks are manufactured using high-quality materials to ensure longevity and reliability.

b. Customization: We understand that different applications have different requirements. That’s why our tanks can be customized in terms of size, shape, and features to meet your specific needs.

c. Environmentally Friendly: Drayton Tanks is committed to sustainability. Our tanks are designed with environmental responsibility in mind, promoting water conservation and efficient water use.

Section 4: Applications of Water Storage Tanks

Our water storage tanks find applications in various sectors:

a. Residential Use: Ensure a reliable water supply for your home, especially in areas prone to water shortages.

b. Agriculture: Support irrigation and livestock needs with efficient water storage solutions.

c. Commercial and Industrial Use: Safeguard your business operations by having a secure and uninterrupted water supply.

d. Municipalities: Enhance emergency preparedness and disaster management with reliable water storage infrastructure.


In conclusion, choosing the right water storage tank is crucial for ensuring a consistent and reliable water supply in a world facing increasing water challenges. At Drayton Tanks, our commitment to quality, durability, and environmental responsibility makes us the ideal choice for all your water storage needs. Invest in a Drayton Tank and secure a sustainable water future for yourself, your business, and your community.

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Introducing SwiftFlow: Revolutionary GRP Water Tanks Delivered in Just 2 Weeks!


SWIFTflow Water Tanks

Water storage is a critical component of various industries and applications, ranging from agriculture and manufacturing to residential and commercial use. Traditionally, procuring high-quality water tanks has been a time-consuming process, often plagued with lengthy lead times and complex logistics. However, the landscape is changing with the advent of SwiftFlow, a groundbreaking range of GRP water tanks that can now be supplied and delivered within a mere two weeks. In this blog post, we explore the remarkable features and benefits of SwiftFlow Water tanks, revolutionizing the water storage industry.

  1. SwiftFlow: Redefining Speed and Efficiency:

The core value proposition of SwiftFlow lies in its ability to deliver top-notch GRP (Glass Reinforced Plastic) water tanks at an unprecedented speed, ensuring swift installations and minimized project timelines. Thanks to a streamlined production process and optimized supply chain management, SwiftFlow has achieved a remarkable feat by reducing the typical delivery time from months to a mere two weeks. This breakthrough not only empowers businesses with enhanced operational efficiency but also enables them to respond quickly to water storage needs, ultimately increasing productivity and reducing downtime.

  1. Uncompromised Quality and Durability:

Despite its rapid delivery time, SwiftFlow never compromises on the quality and durability of its water tanks. Crafted from high-grade GRP materials, these tanks boast exceptional strength and longevity, ensuring reliable performance even in the most demanding environments. SwiftFlowWater tanks are engineered to withstand extreme temperatures, corrosive substances, and UV radiation, making them ideal for a wide range of applications. With a focus on quality assurance, every tank undergoes rigorous testing to meet the highest industry standards, ensuring leak-free and reliable storage for years to come.

  1. Customizable Solutions for Diverse Applications:

Recognizing the diverse needs of different industries, SwiftFlow offers a wide range of tank sizes and configurations to accommodate various water storage requirements. Whether you need a compact tank for a residential setting or a large-capacity tank for industrial use, SwiftFlow has you covered. The ability to customize dimensions, fittings, and accessories ensures that each tank is tailored precisely to meet the customer’s unique specifications. Furthermore, SwiftFlow’s experienced team of engineers and consultants are readily available to offer expert advice and assistance, ensuring the perfect solution for every application.

  1. Seamless Installation and Maintenance:

In addition to their remarkable delivery time, SwiftFlow tanks are designed with ease of installation and maintenance in mind. With their lightweight yet robust construction, these tanks are effortless to transport, maneuver, and install. The modular design allows for quick assembly on-site, reducing installation time and associated costs. Moreover, SwiftFlow provides comprehensive documentation and support to guide customers through the installation process, making it accessible even to those with limited technical expertise. Furthermore, regular maintenance and cleaning of SwiftFlow tanks are simple tasks, allowing businesses to focus on their core operations without undue interruptions.


SwiftFlow has revolutionized the water storage industry by introducing a range of GRP tanks that can be supplied and delivered within an astonishing two-week timeframe. This breakthrough empowers businesses with unmatched speed, reliability, and flexibility in their water storage projects. With SwiftFlow, organizations can now procure high-quality GRP water tanks precisely tailored to their needs, all without compromising on quality or durability. As we witness the future of water storage unfold, SwiftFlow emerges as the definitive choice for industries and applications that demand efficient and dependable water storage solutions.

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How Much do Water Storage Tanks Cost

Water Storage Tanks cost

Discover the cost factors and pricing information for water storage tanks at Drayton Tank & Accessories Ltd. Our comprehensive guide explains the key factors that influence the cost of water storage tanks, such as tank size, material, installation requirements, customization, and location. Request a personalized quote today to get accurate pricing for your specific needs. Trust Drayton Tank & Accessories Ltd for high-quality storage solutions that protect your valuable resources

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Standard Sized Water Storage Tanks

Choose from our wide range of standard-sized water storage tanks designed to meet your specific needs. Whether you require a compact tank for residential use or a larger tank for commercial applications, we have you covered. Our water tanks come in various capacities, including small, medium, and large sizes, ensuring you find the perfect fit for your requirements. Rest assured, our tanks are built to last, made from high-quality materials to provide durability and longevity. Browse our selection of standard sized water storage tanks and enjoy reliable water storage solutions for your home, business, or industrial needs., bespoke and custom size available on requested – Call us for best prices.

Standard Sized Water Storage Tanks

Many More Sizes and Capacities available on top of this list up to 100,000 litres

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GRP Water Tanks: Standard Size and Custom Options | WRAS Approved for Drinking Water

Looking for reliable and efficient water storage solutions? Our GRP (Glass Reinforced Plastic) Water Tanks are designed to meet your diverse needs. With standard sizes and the flexibility of custom sizing, our tanks offer versatile options for various applications. Whether you require storage for drinking water, feed and expansion tanks, cat 5 break tanks, or the containment of chemicals, effluent, or waste water, our WRAS-approved GRP Water Tanks are the perfect choice.

Standard Size and Custom Options

We understand that every project has unique requirements. That’s why our GRP Water Tanks come in both standard sizes and customizable options. Choose from a range of standard sizes to suit your immediate needs, or work with our expert team to design a custom-sized tank that perfectly fits your specific requirements. Our flexible approach ensures that you get the ideal solution for your water storage needs.

WRAS Approved for Drinking Water

When it comes to storing drinking water, safety and quality are paramount. Our GRP Water Tanks are WRAS approved, guaranteeing that they meet the highest standards for drinking water storage. With WRAS certification, you can have peace of mind knowing that our tanks are safe, hygienic, and suitable for use in residential, commercial, and industrial applications where drinking water is stored.

Versatile Design for Various Applications

Our GRP Water Tanks offer exceptional versatility, making them suitable for a wide range of applications. Whether you need a one-piece or two-piece design, our tanks are engineered to meet your specific needs. They are designed to handle various liquids and solutions, including chemicals, effluent, waste water, and more. The robust construction ensures durability and reliable performance in even the harshest environments.

Expertise and Quality Assurance

With years of experience in the industry, we are committed to delivering top-notch products and exceptional service. Our GRP Water Tanks are manufactured using high-quality materials and advanced manufacturing techniques to ensure long-lasting performance and reliability. We adhere to strict quality control measures to ensure that our tanks meet or exceed industry standards.

Choose Our GRP Water Tanks for Reliable Water Storage

When it comes to water storage, trust our GRP Water Tanks to deliver the performance, durability, and versatility you need. With standard sizes and custom options available, WRAS approval for drinking water, and suitability for various applications, our tanks are the ideal solution for your water storage requirements. Contact us today to discuss your project needs and let our team assist you in finding the perfect GRP Water Tank solution.

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The Right Effluent and Waste Water Disposal

Are you disposing of your Effluent and Waste Water correctly?

New Legislation may come in to force that would impose automatic fines on water companies dumping waste in rivers and seas

Check on Gov Website to see information on Discharges to surface water and ground water to see if it effects you.

24000 litre waste water tank
24000 litre waste water Retention tank

We Manufacture GRP Effluent and Waste Water Tanks upto 100,000 Litres, that can help companies reduce the waste they are dumping down the drains.

Waste Water Tank
4000 Litre Waste Water Tank

These Tanks can then be emptied by Tankers, helping the company stay within their allowable drainage limit.

For More information on our Waste Water and Effluent Retention Tanks – Click Here

Suitable for Most Effluent and Wastes, Please contact our experienced team to discuss your requirements

Selection of Standard Tanks sizes is available here up to 100,000 litres

Bespoke Custom sizes tank are also available – Click Here

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GRP Header Tanks – Latest Information and sizes

Get latest information on our GRP Header tanks are designed and manufactured to BS EN 13280

Header Tanks Information – GRP

GRP Header Tank Information

We have a range of Cold Water GRP Header Tanks from 45 litres (10 Gallons) in many sizes up to 10,000 litres and can be manufactured up to 100,000 litres

Most Header Tanks require a small capacity so the more popular sizes are:

182 Litre, 227 Litre, 250 Litre, 318 Litre and 455 Litre

But we do have many sizes available both lesser and greater capacities to suit any requirement.

For Information on our Latest Standard Size for Header Tanks – Standard Tank Sizes

GRP Cold Water Header Tanks Information

Our Cold Water header tanks can be found here Cold Water Header Tanks, These tanks are designed just for cold water and can cope with up to 30 Deg C Max,

Again the capacities of these tanks are usually only small (less than 500 Litres) and we have many sizes to choose from to suit any application from domestic to commercial and industrial, agricultural and all other sectors.

GRP Header Tanks

if there is a size you are looking for not on the page, please contact us for help as we can supply most sizes in this range Tel: 01142166000

GRP Feed & expansion Header Tanks Information

We also produce F&E Header tanks, these tanks usually have a hot water expansion pipe running back into the tank,

These tanks are designed to store cold water yet be able to cope with water up to 90 Deg C

Our F&E Water Tanks can be found here F&E Header Tanks, if there is a size you are looking for not on the page, please contact us for help as we can supply most sizes in this range Tel: 01142166000

You can also fill out our custom Tank Enquiry Form Here

How to size a Header Tanks?

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What is a Two Piece Water Tank

What is a two piece tank?

This type of tank is know as a two piece tank as it is split horizontally half way on the internal height, giving two pieces that can be moved through smaller restricted access such as doorways easier, then bolted and sealed together once it situ. These are also know as Semi Sectional Tanks and Split Tanks.

this type of tank is also know as semi sectional and split tanks but the later should not be confused with a tank with two compartments

For More information on Two Piece Tanks Please click Here

we can also produce Special three piece tanks should the access require it

tanks can be produced up to 3m Long x 3m wide x 2.5m High,

What material are two piece tanks available in?

our two piece tanks and three piece tanks are made from WRAS Approved GRP Material, with a Gelcoat internal surface, and available with encapsulated Wall insulation.

Two piece storage tanks

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Water Tank Information

Drayton Tank GRP Water Tank Information

Water Tanks Range
Let go of stress and hours of internet searches to find
The Water Tank that you or your client needs
Claim back your work day  
Drayton Tanks have a Huge range of tanks, for all requirements, Custom tank sizes for everything else,
Call 08712884213.
We have been building our range of tanks for years, and if you need a certain size this is not an issue.  simply contact our team and we will be happy to help

Break Tanks, Balance Tanks, GRP Water Tanks, Header Tanks plus much more.

Many of our standard tanks can also be customised in many ways.
Standard Tanks

Custom Sizes Tanks

Are you ready to Gain back your work Day?
What’s new
Tank Overflows
Range of Overflows
Tank Overflows incorporating Insect / Rodent Screens :
Standard Overflows
Inline Overflows
End of Line Overflows
Break Tanks
With Many uses
GRP Water Tanks including, Cat 5, Byelaw 30 Tanks, One and Two Piece Tanks. with Custom sizes  available for all versions
Balance Tanks
For Swimming Pool / Spa 
standard sizes and custom sizing for all Balance tanks utilising the space available for the balance tank to be sited in most areas
Drayton Tank & Accessories Ltd
We dont just sell tanks, we help you buy them!

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