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WRAS Approved July 2000
These productscomply with therequirements ofthe DHSS andWRAS.
GRPWater StorageTanks Standard Insulated-
Quality Systems Certificate No: 135Assessed to IS0 9002
Association of Tankand Cistern Manufacturers
GRPWater StorageTanks Standard Insulated-
-The Best Range-The Best Options
- Backed by over30 years’ experience.
CONSTRUCTIONDewey Waters tanks are moulded inONE PIECE using top quality G.R.P.All but the smallest sizes have an integralsteel reinforcement encapsulated within thelaminate, thus preventing corrosion.Deflection of these tanks is less than 1% ofthe side wall length. The tanks have asmooth, pale grey interior and darkturquoise blue textured exterior-nonstandard colours are available at extra cost.
INSULATIONTanks and lids can be integrallyinsulated with 25mm, 50mm or75mm foam (giving values of0.85, 0.40 and 0.27w/m2/°C asrequired). The foam is over-laminated with GRP whichboth protects and preventsfuture removal of theinsulation.
SUPPORTThe tanks are designed to besupported over the whole ofthe base. An optional“reinforced base” is availablewhich allows installation onsupports of not less than 75mmwide at 600mm centres.Any other form of supportshould be specifically drawn toour attention and a specialquotation obtained.
If a drain connection in thebottom of the tank is needed,where a reinforced base isselected, we must be advisedso that provision for it can bemade.
CONNECTIONSAs many specifiers prefer us tosupply connections to the tank,a full range of fittings isavailable.See our “Data Sheet-YourOptions for Tank Connections”for information on tankconnections, sockets, spigotsfull faced flanges etc.Where we are not asked tosupply fittings, standard fittingscan be used.
Standard un-insulated tankscan have holes cut withordinary drills or plumbers’‘hole saws’, however, where thelocation of fittings is critical asketch should be attached tothe order allowing us to checkthat the steel reinforcementdoes not conflict.
With all pre-insulatedFORMAT 30 Tanks. standardconnection points will besupplied unless we get specificdetails before manufacture(see page 4). An additionalcharge will be made for extrasand variations.
It is vitally important that weare informed of any non-standard connection points, asfitters cannot cut through theinsulation and GRP laminate
HEAT AND CHEMICALRESISTANCEOur tanks are designed for thestorage of water up to 55°C butwill stand occasional highertemperatures. They aretherefore suitable for Feed andExpansion tanks. However, ifhigher heat resistance isrequired we can quote forcontinuous operation at up to100°C.
Standard tanks are suitable formany mild and someaggressive chemicals, but wewill only accept responsibilityif we quote against specificdetail.Enquiries should state: Exact chemical makeup
including trace elements,water treatment and dosingadditives.
Maximum concentration. Operating and maximum
temperatures.We can then quote for themanufacture using specialresins appropriate to yourneeds.
without exposing the foam core.Under Water Regulations/Byelaws,insulation materials which permitabsorption of water, breeding ofbacteria etc, and entry of insectsand vermin are no longerpermitted - with the DeweyWaters Insulation Systemyou are safe.
LIDSA choice of lids is available:-1. FORMAT 30 lids -
insulated and withaccessories (see pages 4& 5).
2. Sealed and bolted HEAVYDUTY lids.
3. “Bonded-On” HEAVYDUTY lids (as these lidscannot be removed, amanway is included asstandard - tank sizes C3and above).
Except where “sealed andbolted” and “bonded-on”Heavy Duty Lids are called for,all tanks of over 1000 litreshave covers in sections - sothat one part can be removedfor access without uncoveringthe whole tank (as called for inthe Water Regulations/Byelaws)
Optional Extras1. INSPECTION HATCH in
any tank over 200 litres.(These are not needed tocomply with WaterRegulations/Byelaws butmay be advisable forquicker or additionalaccess).
2. STANDARD MANWAYS intanks of over 1000 litres.
3. RAISED BALL VALUECHAMBERS.
[On some tanks the lid detailwill be varied to accommodatethe latter items.)
Standard Manway.(710mm x 710mm aperture)
Optional Inspection Hatch.(350mm x 350mm aperture)
Raised Ball Valve Chamber.(These con incorporate a WRAS approved
Special overlapping seal detail of
Type ‘A’ Air Gap designed and calculatedmultipart lids.
in strict accordance with BS 6281).
COPYRIGHT DESIGNS
Your easy wayto comply withWaterRegulations/ByelawsAll Dewey Waters one piece GRP tanks arenow available in FORMAT 30 - i.e. completewith all details to enable you to readilycomply with Water Regulations/Byelaws.
One of the major importances of current watersupply regulations is that all water, hot or cold, in anypremises that may be used for human consumptionhas to be potable quality. The word “domestic” nowhas a much wider meaning. Details of constructionand materials used have always been importantnow proper insulation, lid design, the screeningvents, breathers, overflows and warning pipes(“telltales”) are now subject to rigorous rules. Thedifficulty of getting together all the elements of thetank and its peripherals can be time consuming andexpensive and not all users yet understand theproblems involved.Dewey Waters have therefore put togethera package to make it easier for you.
Including
1.
2.
3.
4.
5 .
6 .
7.
8.
Integral encapsulated INSULATION in bothtank and lid (at .8w/m2°C standard - highervalues available for exposed sites).Approved and listed by WRAS.
Close fitting mechanically fixed rigid COVERwith built in screened breather (.65mm mesh)the cover is opaque, edge sealed and has aturned down edge of double skin GRP inWRAS approved material.
Two part cover giving access on all tanksover 1000 litres nom.
An additional inspection hatch is availableif required (not mandatory).
Close laminated prepared [but not drilled)CONNECTION POINTS as per diagram,allowing penetration of the tank withoutexposing the insulation core materials (ascalled for in draft British Standard).
Vent point ready to drill in cover.
22mm micro screened overflow/telltalewhere this size is adequate(i.e. up to 1000 litres) or as a“telltale” or warning pipe where this isneeded in addition to a larger “overflow.”
INTERSECT Micro Screened OverflowProtector - available in various sizes[see page 5) which must relate to your choiceof inlet size. Up to 1000 litres, “telltale” only.Over 1000 litres screened, overflow and“telltale.”
AFloat Valve
B - up to 3” Flanged Connector*- up to 3” Flanged Connector*
E Separate Telltale/Warning Pipe - 22mm fitting (only over1000 litres)
Note: The size of Connection Points will permit the inlet to be fitted
2” inlets.
*up to 2” on tanks E1 and smaller.
4
Mains Cold Water Service
OverflowC&D Cold Water Down Supply
above the overflow to conform to TYPE B airgaps on up to
- up to 2” Tank Connector/
Keep Insects and Vermin Out -Comply with the Byelaws -
Fit theNew Patented...
THE DEWEY WATERSPATENTED MICRO SCREENED
OVERFLOW PROTECTOR
A . Full faced flanges, (bolts andgaskets not supplied).
B . Any debris is automatically washedinto corners and does not blockscreen. (Which is why it works
This simple but effective idea is better fitted vertically.)patented and the patent will be C. Angle increases area of mesh by 2.5defended vigourously. times so that total area of minuteINTERSECT is a reg. trademark. holes exceeds pipe crass section.
0.65mm mesh.WRAS Approved Materials.Required by Water Regulations/Byelaws for tanks ofover 1000 litres.Incorporate in your overflow pipework to provide protectionagainst insects and vermin-as Byelaws require.Fit vertically where possible and not immediately adjacent totank overflow connection.Special mesh design means full free area equal to pipe crosssection and is practically unblockable.Easily unbolted for cleaning.Full faced flanges table E (See Note).Sizes.20mm 0.75” 36mm 1.50” 76mm 3”25mm 1” 51mm 2” 102mm 4”32mm 1.25” 64mm 2.5” 152mm 6”
Larger sizes to order. Carriage free if ordered with tanks.0.75” to 2” can be supplied with BSP female threads as opposed to flanges.Note: We do not supply hacking flanges because the INTERSECT unit isdesigned to fit into non-pressurised single overflow systems and normalbolts with washers (not supplied) are quite sufficient.
.65 Micro-Mesh Screened Breather
22mm "telltale"/warning pipe assembly- can be used as overflow on tanksunder 1000 litres. .65 Micro-Mesh.
5
Weight
OrderingInformation
Choose here from the best and mostcomprehensive range of One Piece GRPstorage tanks.Options to suit your every need.
STANDARDUninsulated tanks - steel reinforced.
INSULATEDTanks and lids - U value options:-
25mm - 0.85w/m2/°C50mm - 0.40w/m2/°C75mm - 0.27w/m2/°C
Your certain way of meeting theWater Regulations/Byelaws. (See page 4)
Suggested SpecificationA1. 4500 Litre tank to FORMAT 30 asmanufactured by Dewey Waters Limited.Wrington, Bristol BS40 5QS.
SPECIALSIf you cannot find the tank you need or have arestricted space for your tank-we will make youa SPECIAL, custom built to your design.
ANY SHAPE - ANY SIZE - ANYWHEREDiscuss your requirements with our TechnicalSales Office.
SECTIONAL TANKSFor larger tanks see our Sectional Tank leaflet.
01934 862601Fax: 01934 862604
E Mail: [email protected]: www.deweywaters.co.uk
*Contact Sales Office for details.6
QUOTATIONSBe prepared for thesequestions!Your tank quotations will beprepared by our Sales Officepersonnel on one of our linkedcomputers. When you phoneyou will be asked the followingquestions in this order. Please
DRIP TRAYSShould circumstances demand, 100mm deep GRP drip trays areavailable for all tanks, sizes of drip trays are listed below.
help us to help you by havingyour answers ready.
1. Dewey Waters Ref. No.e.g. Al(We will then confirmcapacity and dimensions.)
2. Tank type?(Is the tank to store potablewater?)
UNINSULATEDa) Open Top Tank.b) Tank, Lightweight Lid.c) Tank with Heavy Duty
Lid and Manway.(Bolted or Bonded?)
INSULATEDd) FORMAT 30 Tank with
25mm, 50mm, or 75mminsulation.
e) Tank with Heavy DutyLid and Manway with25mm, 50mm, or 75mminsulation.(Bolted or Bonded?)(Upgrade toFORMAT 30?)
Do you need an extra optionalInspection Hatch?Do you need an extra optionalRaised Ball Valve Chamber?3 . Quantity of this tank size
and type?4. Base type?
a) Standardb) Reinforced Base (arethere any base drainconnections?)
5. Do you require connectionfittings? If so, list...
6. How big is the overflow?Do you want anINTERSECT (p.5)?
7. Where is the deliverypoint?
If you write be sure to giveanswers to all these questions.
ALSO AVAILABLE
GRPInsulatedHousingsIn addition to insulating theactual tanks, Dewey Watersoffer you the LOWLINE andALTOS range of mini-housings,modular housings, boilerrooms, plant rooms -right up tomodular buildings. We canhouse tanks in exposed sitesfrom 30 litres to hundreds ofthousands of litres!Ask for literature.
QUALITY CONTROL
To ensure that our productsconsistently match ourproduction standards andthose of our customers, wemonitor the materials used,and test our finished productsto maintain the quality forwhich Dewey Waters is well-known.
DRAWING OFFICE
We maintain a full design anddrawing office, including thelatest CAD facility, to ensurethat we can give our customersthe very best service available.Whether it is a drawing of thetank connections or a completearchitectural design, we areable to assist you.
ORDERING
We can speed your orderingwith our computer aidedquotation and design systems.Specifying a Dewey WatersGRP product takes minutes...not days.Use our fax facility fordrawings, connections dataand detailed specifications.
OTHERDEWEY WATERSPRODUCTS
GRP sectional storagetanks.Stand off and closecoupled cladding forsectional tanks.Steel towers for sectionaltanks.Modular link corridor/walkway enclosures.Architectural GRPmouldings for the buildingindustry.
These are contained in theDewey Waters product manual.
INNOVATIONS
Historically and currently weare the MARKET LEADERS - ifyou don’t see what you need -talk to us. We will find a way.
In accordance with our policy ofcontinuous development andimprovement, we reserve the right tomake changes in design andspecification without notification.
Cox’s GreenWringtonBristol BS40 5QSTelephone: +44 (0)1934 862601Fax: +44 (0)1934 862604
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E Mail: [email protected]: www.deweywaters.co.uk
Dewey Waters Limited
