One Piece Tanks

All Sarena one piece and split tanks are manufactured to European Standards and are WRAS approved. Our products comply with UK Water Supply (water fittings) Regulations 1999 and Water Byelaws 2000 (Scotland).

Sarena offers a wide choice of tank sizes, mostly stock items available within 7 days. Special sizes can be manufactured to clients’ specific requirements by our
in-house pattern making facility.

Structural strength is provided by polyester resin and glass fibre reinforcement, which is finished internally with a smooth impervious isophthalic gel coat.

The gel coat finish on both the tank and lid ensures that harmful bacteria are not offered a surface on which to grow. Furthermore, all Sarena gel coats and colouring pigments are lead-free. To ensure water quality, the resin and gel coats are pigmented throughout to prevent the ingress of light. (Light entering a tank permits the organisms that are already present to multiply, which would contaminate the supply.)

In order to prevent osmosis (a condition whereby water is absorbed into the laminate), it is necessary to implement strict manufacturing controls during the production of water tanks and cisterns. At Sarena, we have implemented key elements into our manufacturing process in order to prevent osmosis. We ensure that the required amount of catalyst needed to cross-link and cure the polyester resin is measured precisely. We also ensure that a constant temperature is maintained throughout our manufacturing facility, as temperature is an essential factor in the correct curing of laminates.

Sarena tanks are given a full water test and results are recorded, ensuring that quality is followed throughout the design, production and finishing processes. Within the procedures documented in the Sarena EN ISO 9001 quality manual, full records are retained and each tank is clearly identified for traceability. Core materials, when used, are compatible with the laminate and are completely encapsulated within the structure.

Base Support

All tanks must be fully supported over the whole base area, with a support system designed to accept the tank and lid, together with the weight of contents and pipe work. Please note: clients are responsible for base support.

Marine ply bases can be supplied bonded into the laminate of a tank or as a separate loose item, cut to specific requirements. (G16.14)

Installation Access

Sarena tanks are of rigid construction and care must be taken that the overall size will pass through all obstructions and fit into the space chosen for the installation. Please check before ordering.

When access restrictions prevent a one piece tank being used, any standard tank can be supplied divided into horizontal sections. Alternative solutions can also be considered.

See our Split Tanks section for details.

Fittings

All tanks holding wholesome water must be fitted with a screened vent and screened warning/overflow pipe. Tanks holding over 1000 litres actual capacity will require a separate warning and overflow pipe, sized according to the incoming mains supply.

See our Fittings section for details (G16.8)

Pre-insulation

Sarena was the first tank manufacturer to offer pre-insulation, a system incorporating polyurethane foam encapsulated within the laminate, thereby preventing moisture being absorbed into the insulation and consequent reduction in insulation value.

Normal practice is to pre-insulate the sides and lid whilst making provision for fittings. This prevents the need to penetrate the outer skin on-site.

Please note that, where possible, the size and location of fittings required should be stated when ordering tanks.

The base of tanks can also be pre-insulated. Insulation is zero ozone depletion polyurethane.

Options available:

• 25mm thick insulation = 'U' value of 0.83 w/m²
• 50mm thick insulation = 'U' value of 0.45 w/m²
• 100mm thick insulation = 'U' value of 0.23 w/m²

Lids

All tanks are supplied with lids and each lid is fitted with a closed-cell approved gasket, adhesive on one side, enabling the air gap to be achieved. Stainless steel fixings secure lids in position.

Tanks holding in excess of 1000 litres actual capacity have lids which incorporate a bolted access for maintenance. Alternative opening mechanisms are also available to meet specific requirements. (G16.13)

Hot Water & Chemical Tank Options

Different resin systems are used for hot water and chemical storage. Feed and expansion tanks for the primary circuit are manufactured in hot water resins to ensure performance in the event of a thermostat failure. All one piece and split tanks are available in these options. A WRAS approved resin is available if required.

Division Plates

If there is a requirement to split the tank into two separate compartments, division plates are moulded into the tank, and the lid will therefore come in two pieces with a separate access in each piece.

Raised Valve Box "AA" or "AB" Air Gaps

To maximise capacity or to offer type "AA" or "AB" air gap a valve box may be included in the lid thus allowing either a valve with a drop arm or an Aylesbury KA/KB valve to be fitted.

When an "AB" air gap is needed we cut the required size slot in the side wall of the tank (dependant on inlet size). This is then covered with a specially moulded shroud which incorporates a screened mesh. Below this you can either use a drip tray or have a catchment tank fixed. Either of these options can be plumbed to discharge any overflow to a visible position. For type "AA" air gaps the screened mesh is omitted. (G15.31)

Weirs and Baffles

With the flexibility of our production techniques we are able to include weirs and baffle plates to meet customers' exact requirements.

Fittings

Sarena offers a full range of tank fittings. These can be purchased separately or as part of the package.

See our fittings section for details (G16.8)

Size Chart

The size charts detail the one piece and split tanks available. There is no difference in performance or quality in any of the ranges.

The term Nominal Capacity (Nom Cap.) denotes the amount of water stored to the top edge/flange of the tank.

Size Chart for One Piece Tanks

Alternative Insulation Options

We offer foil faced foam or 60mm thick glass insulation material encapsulated within a plastic sleeve (jacket). (G16.13)

	Ref No.	Nom Cap.	Nom Cap.	Internal Dims (mm)			O/A Dims (mm) (Excluding Lid)			Approx Weight Plain	Approx Weight Pre-ins.	Actual Cap.*
		Litres	Gallons	L	W	H	L	W	H	Kg	Kg	Litres
	SC10	45	10	460	305	305	520	365	310	3.5	5.5	18
	SC20	91	20	160	410	380	670	470	385	6	10	50
	SC30	136	30	610	460	480	670	520	490	8	13	84
	SC40	182	40	685	510	510	745	570	520	10	16	115
	SC50	227	50	740	560	560	800	620	570	12	20	157
	SC60	272	60	760	580	610	820	640	620	14	22	167
	Domestic	281	62	990	510	560	1050	570	570	14	22	166
	SC70	317	70	915	610	580	975	670	590	14.5	23	195
	SC80	364	80	910	660	610	970	720	620	15	25	228
	SC100/1	454	100	1220	610	610	1280	670	620	21	30	282
	SC100/2	454	100	965	685	685	1025	745	695	19	28	300
	SC125	567	125	965	760	790	1065	860	805	32	42	410
	SC150	681	150	1090	860	735	1190	960	750	35	47	440
	SC200	908	200	1170	890	890	1270	990	905	40	54	650
	SC250	1135	250	1520	910	810	1620	1010	825	50	67	753
	SC350	1589	350	1520	1140	910	1670	1290	925	66	88	1116
	SC500	2270	500	1830	1220	1020	1980	1370	1035	104	140	1684
	SC600	2724	600	1830	1220	1220	1980	1370	1235	118	165	2130
	SC600H	2724	600	1220	1220	1830	1370	1370	1850	155	208	2327
	SC1000	4540	1000	2440	1520	1220	2640	1720	1240	190	254	3371
	Ref No.	Nom Cap.	Nom Cap.	Internal Dims (mm)			O/A Dims (mm) (Excluding Lid)			Approx Weight Plain	Approx Weight Pre-ins.	Actual Cap.*
		Litres	Gallons	L	W	H	L	W	H	Kg	Kg	Litres
	M1	27	6	610	150	305	660	200	310	3	5	11
	M2	68	15	610	305	380	670	365	385	5	8	37
	M3	114	25	430	380	750	490	440	760	8	13	93
	M4	131	29	610	280	790	670	340	800	9	15	104
	M5	250	55	505	505	990	565	565	1000	12	19	206
	M6	236	52	685	505	685	745	565	695	11	18	174
	M7	276	61	620	530	840	680	590	850	12	19	200
	M8	272	60	760	455	825	820	515	835	12	19	206
	M9	281	62	610	505	910	670	565	920	12	19	209
	M10	327	72	620	430	1220	680	490	1230	19	30	264
	M11	308	68	1675	405	455	1735	465	465	16	26	186
	M12	354	78	1220	610	480	1280	670	490	16	26	223
	M13	431	95	1550	455	610	1610	515	620	21	29	268
	M14	650	143	2285	620	455	2385	720	470	36	48	318
	M15	681	150	1830	610	610	1930	710	625	40	53	424
	M16	1180	260	1420	910	910	1520	1010	925	59	79	832
	M17	1652	364	1400	990	1195	1500	1090	1210	75	98	1287
	M18	1816	400	1220	1220	1220	1320	1320	1235	78	105	1420
	M19	3632	800	2440	1220	1220	2640	1420	1240	159	213	2839
	M20	6810	1500	3660	1520	1220	3860	1720	1240	250	335	5056
	Ref No.	Nom Cap.	Nom Cap.	Internal Dims (mm)			O/A Dims (mm) (Excluding Lid)			Approx Weight Plain	Approx Weight Pre-ins.	Actual Cap.*
		Litres	Gallons	L	W	H	L	W	H	Kg	Kg	Litres
	EN1	125	27	500	500	500	560	560	510	10	16	80
	EN2	500	110	1000	1000	500	1100	1100	510	30	45	320
	EN3	1000	220	1000	1000	1000	1100	1100	1015	45	59	769
	EN4	2000	440	2000	1000	1000	2150	1150	1015	84	113	1468
	EN5	3000	660	2000	1000	1500	2150	1150	1520	130	175	2467
	EN6	3000	660	2000	1500	1000	2150	1650	1020	120	162	2202
	EN7	3000	660	300	1000	1000	3150	1150	1020	155	205	2202
	EN8	4500	990	2000	1500	1500	2150	1650	1530	210	280	3566
	EN9	4500	990	3000	1000	1500	3150	1150	1530	250	330	3566
	EN10	5000	1100	2500	2000	1000	2650	2150	1030	240	320	3446
	EN11	7500	1650	2500	2000	1500	2650	2150	1530	320	410	5818
	EN12	2250	495	1500	1500	1000	1650	1650	1030	105	142	1652
	EN13	3370	740	1500	1500	1500	1650	1650	1530	170	234	2775
	EN14	8000	1760	2000	2000	2000	2200	2200	2030	350	455	6652
	EN15	1500	328	1500	1000	1000	1650	1150	1010	80	110	1101
	EN16	2250	495	1500	1000	1500	1650	1150	1520	130	175	1850
	EN17	3000	660	1500	1000	2000	1650	1150	2020	195	260	2599
	EN18	1500	330	1000	1000	1500	1150	1150	1520	85	115	1234
	EN19	2000	440	1000	1000	2000	1150	1150	2020	135	180	1733

* To determine actual capacity, which is up to the water line, the size and type of inlet valve is required.

Size Chart for Drip Trays

	Product Code	Sizes Available (mm)
		L	W	H
	DT1	760	510	50
	DT2	915	715	50
	DT3	1115	810	50
	DT4	1420	755	75
	DT5	1215	1915	75
	DT6	1525	1070	155
	DT7	1525	1525	145
	DT8	1830	1220	145
	DT9	2130	1523	145
	DT0	2725	1525	200
	DT11	2745	1830	105