Naylor Clay Drainage Introduction

Question 1

What are the two most widely used product ranges in the UK clay market?

Answer 1

Naylor Densleeve & Hepworth Supersleeve

Question 2

Which manufacturer supplies Hepworth Supersleeve in the UK?

Answer 2

Wavin

Question 3

Clay pipework is manufactured in accordance to which BS EN standard?

Answer 3

BS EN 295

Question 4

What is the jetting pressure rating for clay pipes?

Answer 4

7500 PSI (510 bar)

Question 5

True or false: Densleeve is the most popular clay drainage product.

Answer 5

False, Supersleeve is the most popular clay drainage product

Question 6

True or false: Densleeve has the same OD as Supersleeve?

Answer 6

False, they have different OD and cannot be interchanged without the use of adaptors

Question 7

Where is clay drainage likely to be used?

Answer 7

Commercial developments, schools, hospitals, prisons, estate roads to housing, contaminated grounds/landfill

Question 8

Who is likely to use clay drainage products?

Answer 8

Civil engineers, groundworkers, drainage contractors, construction companies, earth moving contractors, local authorities, water companies

Question 9

House builders will always use clay drainage products. True or false?

Answer 9

False, clay drainage is only occasionally used in house building

Question 10

Name the 4 different sizes (DN) of Densleeve clay drainage.

Answer 10

DN100, DN150, DN225 & DN300

Question 11

What couplings allow clay drainage to be used in contaminated ground?

Answer 11

Nitrile couplings make clay drainage safe in contaminated ground

Question 12

What is the lifetime expectancy for clay drainage?

Answer 12

In excess of 100 years

Question 13

Is clay drainage suitable for adoption?

Answer 13

Yes, clay pipework can be adopted

Question 14

What connection method is used for clay drainage: Push Fit or Electrofusion?

Answer 14

Push Fit connections

Question 15

What is the main benefit for push fit connections?

Answer 15

Quick installation, and allows for immediate testing and backfilling

Question 16

Clay drainage has flexible joints. Why is this a benefit?

Answer 16

Accomdates for minor settlement and ground movement

Question 17

Can clay drainage be recycled?

Answer 17

Yes, pipework can be recycled and re-used in manufacture

Question 18

If clay drainage is being used as part of a roads and sewers package, what 3 main JDP products can you also quote for?

Answer 18

Flag & Kerb, Concrete Rings/Axedo, Manhole Covers

Question 19

Why does clay drainage have a long life expectancy?

Answer 19

Strength does not degrade over time, withstand high imposed loads, higher jetting pressure

Question 20

Why is it important to find out whether the customer requires Densleeve or Supersleeve?

Answer 20

Densleeve and Supersleeve have different OD, and aren’t interchangeable without adaptors

Question 21

Clay drainage can be used in commercial developments, such as office blocks or trading estates. True or false?

Answer 21

True, clay drainage is suitable for all types of commercial developments

Question 22

Clay drainage can also be used in specialist chemical resistant applications. What is the name of this clay pipe?

Answer 22

Naylor Hathernware

Question 23

McLocking McLock is the name of Naylor’s jacking clay pipe product range. True or false?

Answer 23

False, the name of Naylor’s jacking clay pipe is Denlock

Question 24

True or false: Wavin supply chemically resistant clay drainage pipe.

Answer 24

False, Naylor Hathernware can be used in chemical resistant applications

Question 25

Local authorities won't adopt clay drainage pipe. True or false?

Answer 25

False, most local authorities prefer clay drainage especially in adoptable applications

Question 26

Densleeve clay has a jetting pressure rating of over 9000 PSI. True or false?

Answer 26

False, the pressure rating of Densleeve is 7500 (510 bar)

Question 27

Densleeve clay can withstand most loading situations with as dug backfill. True or false?

Answer 27

True, clay drainage pipe is rigid and does not distort under load

Question 28

What 3 main clay drainage fittings can JDP also provide other than clay pipe?

Answer 28

Bends, junctions, connectors and inspection chambers

Question 29

True or false: Densleeve is more brittle than Supersleeve, that's why Supersleeve is more popular.

Answer 29

False, Densleeve is less brittle than Supersleeve, and is easier to cut and handle with much less breakages.

Question 30

What are the four add on products that make up a clay system?

Answer 30

Flexible couplers/ adaptorsPlastic adaptors to house drainagePPIC chambers (DYKA range with DC inlet or Axedo adaptors)Aggregates

Question 31

For more extreme operational conditions, Hathernware clay is available in which 2 options?

Answer 31

FCR (Fully Chemically Resistant)HT (High Temperature)

Question 32

True or false: clay is a new product for JDP and is difficult to sell to customers.

Answer 32

False, clay is a mature product and widespread product and used in many applications.

Question 33

Clay is a preferred method of drainage in certain applications. True or False?

Answer 33

True, particularly adoptable applications.

Question 34

Can JDP still supply everything groundworker customer needs without stocking clay?

Answer 34

No